Home / 1,320,154,429.20-1,980,231,643.80-399,911,193.60

Finding the Fourth Proportional to 1,320,154,429.20, 1,980,231,643.80 and 399,911,193.60

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Solution

The fourth proportional to 1,320,154,429.20, 1,980,231,643.80 and 399,911,193.60 is: 599,866,790.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,154,429.20 : 1,980,231,643.80 = 399,911,193.60 : x
  2. Step 2: Convert to fraction form
    1,320,154,429.20/1,980,231,643.80 = 399,911,193.60/x
  3. Step 3: Cross multiply
    1,320,154,429.20x = 1,980,231,643.80 × 399,911,193.60
  4. Step 4: Simplify right side
    1,320,154,429.20x = 791,916,800,276,548,096
  5. Step 5: Solve for x
    x = 791,916,800,276,548,096/1,320,154,429.20
  6. Step 6: Final answer
    x = 599,866,790.40

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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.