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Finding the Fourth Proportional to 517.42, 776.18 and 170.75

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Solution

The fourth proportional to 517.42, 776.18 and 170.75 is: 256.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.42 : 776.18 = 170.75 : x
  2. Step 2: Convert to fraction form
    517.42/776.18 = 170.75/x
  3. Step 3: Cross multiply
    517.42x = 776.18 × 170.75
  4. Step 4: Simplify right side
    517.42x = 132,531.88
  5. Step 5: Solve for x
    x = 132,531.88/517.42
  6. Step 6: Final answer
    x = 256.14

Related Problems

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.