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Finding the Fourth Proportional to 521.16, 719.24 and 372.05

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Solution

The fourth proportional to 521.16, 719.24 and 372.05 is: 513.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    521.16 : 719.24 = 372.05 : x
  2. Step 2: Convert to fraction form
    521.16/719.24 = 372.05/x
  3. Step 3: Cross multiply
    521.16x = 719.24 × 372.05
  4. Step 4: Simplify right side
    521.16x = 267,593.24
  5. Step 5: Solve for x
    x = 267,593.24/521.16
  6. Step 6: Final answer
    x = 513.46

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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.