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Finding the Fourth Proportional to 515,909.20, 773,863.80 and 141,931.60

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Solution

The fourth proportional to 515,909.20, 773,863.80 and 141,931.60 is: 212,897.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,909.20 : 773,863.80 = 141,931.60 : x
  2. Step 2: Convert to fraction form
    515,909.20/773,863.80 = 141,931.60/x
  3. Step 3: Cross multiply
    515,909.20x = 773,863.80 × 141,931.60
  4. Step 4: Simplify right side
    515,909.20x = 109,835,727,316.08
  5. Step 5: Solve for x
    x = 109,835,727,316.08/515,909.20
  6. Step 6: Final answer
    x = 212,897.40

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Similar ratio
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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.