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Finding the Fourth Proportional to 445,057.49, 667,691.25 and 145,536.90

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Solution

The fourth proportional to 445,057.49, 667,691.25 and 145,536.90 is: 218,339.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,057.49 : 667,691.25 = 145,536.90 : x
  2. Step 2: Convert to fraction form
    445,057.49/667,691.25 = 145,536.90/x
  3. Step 3: Cross multiply
    445,057.49x = 667,691.25 × 145,536.90
  4. Step 4: Simplify right side
    445,057.49x = 97,173,716,206.93
  5. Step 5: Solve for x
    x = 97,173,716,206.93/445,057.49
  6. Step 6: Final answer
    x = 218,339.70

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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.