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Finding the Fourth Proportional to 487,488.57, 672,806.88 and 283,660.17

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Solution

The fourth proportional to 487,488.57, 672,806.88 and 283,660.17 is: 391,493.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,488.57 : 672,806.88 = 283,660.17 : x
  2. Step 2: Convert to fraction form
    487,488.57/672,806.88 = 283,660.17/x
  3. Step 3: Cross multiply
    487,488.57x = 672,806.88 × 283,660.17
  4. Step 4: Simplify right side
    487,488.57x = 190,848,513,957.97
  5. Step 5: Solve for x
    x = 190,848,513,957.97/487,488.57
  6. Step 6: Final answer
    x = 391,493.31

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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.