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Finding the Fourth Proportional to 672,039.40, 1,008,059.10 and 667,373.80

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Solution

The fourth proportional to 672,039.40, 1,008,059.10 and 667,373.80 is: 1,001,060.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,039.40 : 1,008,059.10 = 667,373.80 : x
  2. Step 2: Convert to fraction form
    672,039.40/1,008,059.10 = 667,373.80/x
  3. Step 3: Cross multiply
    672,039.40x = 1,008,059.10 × 667,373.80
  4. Step 4: Simplify right side
    672,039.40x = 672,752,232,191.58
  5. Step 5: Solve for x
    x = 672,752,232,191.58/672,039.40
  6. Step 6: Final answer
    x = 1,001,060.70

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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.