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Finding the Fourth Proportional to 865,805,251.10, 1,298,707,876.65 and 804,583,247.90

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Solution

The fourth proportional to 865,805,251.10, 1,298,707,876.65 and 804,583,247.90 is: 1,206,874,871.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    865,805,251.10 : 1,298,707,876.65 = 804,583,247.90 : x
  2. Step 2: Convert to fraction form
    865,805,251.10/1,298,707,876.65 = 804,583,247.90/x
  3. Step 3: Cross multiply
    865,805,251.10x = 1,298,707,876.65 × 804,583,247.90
  4. Step 4: Simplify right side
    865,805,251.10x = 1,044,918,601,468,369,664
  5. Step 5: Solve for x
    x = 1,044,918,601,468,369,664/865,805,251.10
  6. Step 6: Final answer
    x = 1,206,874,871.85

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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.