Home / 717,941.28-990,759.20-391,254.42

Finding the Fourth Proportional to 717,941.28, 990,759.20 and 391,254.42

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Solution

The fourth proportional to 717,941.28, 990,759.20 and 391,254.42 is: 539,931.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,941.28 : 990,759.20 = 391,254.42 : x
  2. Step 2: Convert to fraction form
    717,941.28/990,759.20 = 391,254.42/x
  3. Step 3: Cross multiply
    717,941.28x = 990,759.20 × 391,254.42
  4. Step 4: Simplify right side
    717,941.28x = 387,638,914,199.39
  5. Step 5: Solve for x
    x = 387,638,914,199.39/717,941.28
  6. Step 6: Final answer
    x = 539,931.22

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Double scale
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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.