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Finding the Fourth Proportional to 417,640.40, 626,460.60 and 240,693.20

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Solution

The fourth proportional to 417,640.40, 626,460.60 and 240,693.20 is: 361,039.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    417,640.40 : 626,460.60 = 240,693.20 : x
  2. Step 2: Convert to fraction form
    417,640.40/626,460.60 = 240,693.20/x
  3. Step 3: Cross multiply
    417,640.40x = 626,460.60 × 240,693.20
  4. Step 4: Simplify right side
    417,640.40x = 150,784,806,487.92
  5. Step 5: Solve for x
    x = 150,784,806,487.92/417,640.40
  6. Step 6: Final answer
    x = 361,039.80

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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.