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Finding the Fourth Proportional to 439.07, 658.70 and 276.57

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Solution

The fourth proportional to 439.07, 658.70 and 276.57 is: 414.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.07 : 658.70 = 276.57 : x
  2. Step 2: Convert to fraction form
    439.07/658.70 = 276.57/x
  3. Step 3: Cross multiply
    439.07x = 658.70 × 276.57
  4. Step 4: Simplify right side
    439.07x = 182,175.28
  5. Step 5: Solve for x
    x = 182,175.28/439.07
  6. Step 6: Final answer
    x = 414.92

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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.