Home / 1,327,792,030.20-1,991,688,045.30-811,231,378.20

Finding the Fourth Proportional to 1,327,792,030.20, 1,991,688,045.30 and 811,231,378.20

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Solution

The fourth proportional to 1,327,792,030.20, 1,991,688,045.30 and 811,231,378.20 is: 1,216,847,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327,792,030.20 : 1,991,688,045.30 = 811,231,378.20 : x
  2. Step 2: Convert to fraction form
    1,327,792,030.20/1,991,688,045.30 = 811,231,378.20/x
  3. Step 3: Cross multiply
    1,327,792,030.20x = 1,991,688,045.30 × 811,231,378.20
  4. Step 4: Simplify right side
    1,327,792,030.20x = 1,615,719,837,933,182,976
  5. Step 5: Solve for x
    x = 1,615,719,837,933,182,976/1,327,792,030.20
  6. Step 6: Final answer
    x = 1,216,847,067.30

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Double scale
Find fourth proportional to 1,327,792,031.20, 1,991,688,046.80 and 811,231,379.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.