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Finding the Fourth Proportional to 521.64, 716.92 and 447.53

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Solution

The fourth proportional to 521.64, 716.92 and 447.53 is: 615.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.64 : 716.92 = 447.53 : x
  2. Step 2: Convert to fraction form
    521.64/716.92 = 447.53/x
  3. Step 3: Cross multiply
    521.64x = 716.92 × 447.53
  4. Step 4: Simplify right side
    521.64x = 320,838.50
  5. Step 5: Solve for x
    x = 320,838.50/521.64
  6. Step 6: Final answer
    x = 615.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.