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Finding the Fourth Proportional to 672,892.90, 1,009,890.15 and 667,644.10

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Solution

The fourth proportional to 672,892.90, 1,009,890.15 and 667,644.10 is: 1,002,012.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,892.90 : 1,009,890.15 = 667,644.10 : x
  2. Step 2: Convert to fraction form
    672,892.90/1,009,890.15 = 667,644.10/x
  3. Step 3: Cross multiply
    672,892.90x = 1,009,890.15 × 667,644.10
  4. Step 4: Simplify right side
    672,892.90x = 674,247,200,295.62
  5. Step 5: Solve for x
    x = 674,247,200,295.62/672,892.90
  6. Step 6: Final answer
    x = 1,002,012.65

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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.