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Finding the Fourth Proportional to 520.19, 717.14 and 372.56

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Solution

The fourth proportional to 520.19, 717.14 and 372.56 is: 513.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.19 : 717.14 = 372.56 : x
  2. Step 2: Convert to fraction form
    520.19/717.14 = 372.56/x
  3. Step 3: Cross multiply
    520.19x = 717.14 × 372.56
  4. Step 4: Simplify right side
    520.19x = 267,172.23
  5. Step 5: Solve for x
    x = 267,172.23/520.19
  6. Step 6: Final answer
    x = 513.61

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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.