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Finding the Fourth Proportional to 478,456.93, 660,133.56 and 284,702.70

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Solution

The fourth proportional to 478,456.93, 660,133.56 and 284,702.70 is: 392,808.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,456.93 : 660,133.56 = 284,702.70 : x
  2. Step 2: Convert to fraction form
    478,456.93/660,133.56 = 284,702.70/x
  3. Step 3: Cross multiply
    478,456.93x = 660,133.56 × 284,702.70
  4. Step 4: Simplify right side
    478,456.93x = 187,941,806,892.61
  5. Step 5: Solve for x
    x = 187,941,806,892.61/478,456.93
  6. Step 6: Final answer
    x = 392,808.20

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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.