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Finding the Fourth Proportional to 678,032.72, 935,866.68 and 423,230.48

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Solution

The fourth proportional to 678,032.72, 935,866.68 and 423,230.48 is: 584,171.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,032.72 : 935,866.68 = 423,230.48 : x
  2. Step 2: Convert to fraction form
    678,032.72/935,866.68 = 423,230.48/x
  3. Step 3: Cross multiply
    678,032.72x = 935,866.68 × 423,230.48
  4. Step 4: Simplify right side
    678,032.72x = 396,087,304,192.41
  5. Step 5: Solve for x
    x = 396,087,304,192.41/678,032.72
  6. Step 6: Final answer
    x = 584,171.37

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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.