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Finding the Fourth Proportional to 438,614.80, 656,755.80 and 279,984.40

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Solution

The fourth proportional to 438,614.80, 656,755.80 and 279,984.40 is: 419,232.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,614.80 : 656,755.80 = 279,984.40 : x
  2. Step 2: Convert to fraction form
    438,614.80/656,755.80 = 279,984.40/x
  3. Step 3: Cross multiply
    438,614.80x = 656,755.80 × 279,984.40
  4. Step 4: Simplify right side
    438,614.80x = 183,881,378,609.52
  5. Step 5: Solve for x
    x = 183,881,378,609.52/438,614.80
  6. Step 6: Final answer
    x = 419,232.04

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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.