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Finding the Fourth Proportional to 487,640.43, 672,672.96 and 283,668.39

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Solution

The fourth proportional to 487,640.43, 672,672.96 and 283,668.39 is: 391,304.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,640.43 : 672,672.96 = 283,668.39 : x
  2. Step 2: Convert to fraction form
    487,640.43/672,672.96 = 283,668.39/x
  3. Step 3: Cross multiply
    487,640.43x = 672,672.96 × 283,668.39
  4. Step 4: Simplify right side
    487,640.43x = 190,816,055,559.73
  5. Step 5: Solve for x
    x = 190,816,055,559.73/487,640.43
  6. Step 6: Final answer
    x = 391,304.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.