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Finding the Fourth Proportional to 678,793.83, 1,018,411.92 and 323,761.65

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Solution

The fourth proportional to 678,793.83, 1,018,411.92 and 323,761.65 is: 485,747.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,793.83 : 1,018,411.92 = 323,761.65 : x
  2. Step 2: Convert to fraction form
    678,793.83/1,018,411.92 = 323,761.65/x
  3. Step 3: Cross multiply
    678,793.83x = 1,018,411.92 × 323,761.65
  4. Step 4: Simplify right side
    678,793.83x = 329,722,723,598.87
  5. Step 5: Solve for x
    x = 329,722,723,598.87/678,793.83
  6. Step 6: Final answer
    x = 485,747.97

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Double scale
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Similar ratio
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1.5x scale

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.