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Finding the Fourth Proportional to 535,321.80, 802,978.92 and 135,963.72

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Solution

The fourth proportional to 535,321.80, 802,978.92 and 135,963.72 is: 203,944.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    535,321.80 : 802,978.92 = 135,963.72 : x
  2. Step 2: Convert to fraction form
    535,321.80/802,978.92 = 135,963.72/x
  3. Step 3: Cross multiply
    535,321.80x = 802,978.92 × 135,963.72
  4. Step 4: Simplify right side
    535,321.80x = 109,176,001,044.78
  5. Step 5: Solve for x
    x = 109,176,001,044.78/535,321.80
  6. Step 6: Final answer
    x = 203,944.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.