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Finding the Fourth Proportional to 917,074.20, 1,376,648.10 and 707,640.60

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Solution

The fourth proportional to 917,074.20, 1,376,648.10 and 707,640.60 is: 1,062,260.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,074.20 : 1,376,648.10 = 707,640.60 : x
  2. Step 2: Convert to fraction form
    917,074.20/1,376,648.10 = 707,640.60/x
  3. Step 3: Cross multiply
    917,074.20x = 1,376,648.10 × 707,640.60
  4. Step 4: Simplify right side
    917,074.20x = 974,172,087,472.86
  5. Step 5: Solve for x
    x = 974,172,087,472.86/917,074.20
  6. Step 6: Final answer
    x = 1,062,260.92

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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.