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Finding the Fourth Proportional to 445,046.60, 667,761.90 and 258,217.80

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Solution

The fourth proportional to 445,046.60, 667,761.90 and 258,217.80 is: 387,438.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,046.60 : 667,761.90 = 258,217.80 : x
  2. Step 2: Convert to fraction form
    445,046.60/667,761.90 = 258,217.80/x
  3. Step 3: Cross multiply
    445,046.60x = 667,761.90 × 258,217.80
  4. Step 4: Simplify right side
    445,046.60x = 172,428,008,741.82
  5. Step 5: Solve for x
    x = 172,428,008,741.82/445,046.60
  6. Step 6: Final answer
    x = 387,438.10

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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.