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Finding the Fourth Proportional to 390,951.52, 539,757.36 and 268,654.48

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Solution

The fourth proportional to 390,951.52, 539,757.36 and 268,654.48 is: 370,911.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,951.52 : 539,757.36 = 268,654.48 : x
  2. Step 2: Convert to fraction form
    390,951.52/539,757.36 = 268,654.48/x
  3. Step 3: Cross multiply
    390,951.52x = 539,757.36 × 268,654.48
  4. Step 4: Simplify right side
    390,951.52x = 145,008,232,876.97
  5. Step 5: Solve for x
    x = 145,008,232,876.97/390,951.52
  6. Step 6: Final answer
    x = 370,911.03

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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.