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Finding the Fourth Proportional to 417,754.40, 626,631.60 and 137,280.80

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Solution

The fourth proportional to 417,754.40, 626,631.60 and 137,280.80 is: 205,921.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,754.40 : 626,631.60 = 137,280.80 : x
  2. Step 2: Convert to fraction form
    417,754.40/626,631.60 = 137,280.80/x
  3. Step 3: Cross multiply
    417,754.40x = 626,631.60 × 137,280.80
  4. Step 4: Simplify right side
    417,754.40x = 86,024,487,353.28
  5. Step 5: Solve for x
    x = 86,024,487,353.28/417,754.40
  6. Step 6: Final answer
    x = 205,921.20

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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.