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Finding the Fourth Proportional to 727,793.10, 1,091,689.65 and 680,553.90

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Solution

The fourth proportional to 727,793.10, 1,091,689.65 and 680,553.90 is: 1,020,830.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    727,793.10 : 1,091,689.65 = 680,553.90 : x
  2. Step 2: Convert to fraction form
    727,793.10/1,091,689.65 = 680,553.90/x
  3. Step 3: Cross multiply
    727,793.10x = 1,091,689.65 × 680,553.90
  4. Step 4: Simplify right side
    727,793.10x = 742,953,648,897.14
  5. Step 5: Solve for x
    x = 742,953,648,897.14/727,793.10
  6. Step 6: Final answer
    x = 1,020,830.85

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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.