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Finding the Fourth Proportional to 520.17, 717.42 and 372.75

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Solution

The fourth proportional to 520.17, 717.42 and 372.75 is: 514.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.17 : 717.42 = 372.75 : x
  2. Step 2: Convert to fraction form
    520.17/717.42 = 372.75/x
  3. Step 3: Cross multiply
    520.17x = 717.42 × 372.75
  4. Step 4: Simplify right side
    520.17x = 267,418.31
  5. Step 5: Solve for x
    x = 267,418.31/520.17
  6. Step 6: Final answer
    x = 514.10

Related Problems

Find fourth proportional to 260.09, 358.71 and 186.38
Half scale
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Double scale
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Similar ratio
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1.5x scale

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.