Home / 990,870.99-1,367,356.23-561,154.20

Finding the Fourth Proportional to 990,870.99, 1,367,356.23 and 561,154.20

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Solution

The fourth proportional to 990,870.99, 1,367,356.23 and 561,154.20 is: 774,366.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,870.99 : 1,367,356.23 = 561,154.20 : x
  2. Step 2: Convert to fraction form
    990,870.99/1,367,356.23 = 561,154.20/x
  3. Step 3: Cross multiply
    990,870.99x = 1,367,356.23 × 561,154.20
  4. Step 4: Simplify right side
    990,870.99x = 767,297,691,360.67
  5. Step 5: Solve for x
    x = 767,297,691,360.67/990,870.99
  6. Step 6: Final answer
    x = 774,366.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.