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Finding the Fourth Proportional to 520,902.60, 781,353.90 and 126,918.60

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Solution

The fourth proportional to 520,902.60, 781,353.90 and 126,918.60 is: 190,377.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,902.60 : 781,353.90 = 126,918.60 : x
  2. Step 2: Convert to fraction form
    520,902.60/781,353.90 = 126,918.60/x
  3. Step 3: Cross multiply
    520,902.60x = 781,353.90 × 126,918.60
  4. Step 4: Simplify right side
    520,902.60x = 99,168,343,092.54
  5. Step 5: Solve for x
    x = 99,168,343,092.54/520,902.60
  6. Step 6: Final answer
    x = 190,377.90

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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.