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Finding the Fourth Proportional to 521.46, 781.86 and 444.12

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Solution

The fourth proportional to 521.46, 781.86 and 444.12 is: 665.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.46 : 781.86 = 444.12 : x
  2. Step 2: Convert to fraction form
    521.46/781.86 = 444.12/x
  3. Step 3: Cross multiply
    521.46x = 781.86 × 444.12
  4. Step 4: Simplify right side
    521.46x = 347,239.66
  5. Step 5: Solve for x
    x = 347,239.66/521.46
  6. Step 6: Final answer
    x = 665.90

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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.