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Finding the Fourth Proportional to 866,979.70, 1,300,469.55 and 762,003.70

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Solution

The fourth proportional to 866,979.70, 1,300,469.55 and 762,003.70 is: 1,143,005.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    866,979.70 : 1,300,469.55 = 762,003.70 : x
  2. Step 2: Convert to fraction form
    866,979.70/1,300,469.55 = 762,003.70/x
  3. Step 3: Cross multiply
    866,979.70x = 1,300,469.55 × 762,003.70
  4. Step 4: Simplify right side
    866,979.70x = 990,962,608,837.34
  5. Step 5: Solve for x
    x = 990,962,608,837.34/866,979.70
  6. Step 6: Final answer
    x = 1,143,005.55

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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.