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Finding the Fourth Proportional to 521.04, 717.48 and 447.24

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Solution

The fourth proportional to 521.04, 717.48 and 447.24 is: 615.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.04 : 717.48 = 447.24 : x
  2. Step 2: Convert to fraction form
    521.04/717.48 = 447.24/x
  3. Step 3: Cross multiply
    521.04x = 717.48 × 447.24
  4. Step 4: Simplify right side
    521.04x = 320,885.76
  5. Step 5: Solve for x
    x = 320,885.76/521.04
  6. Step 6: Final answer
    x = 615.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.