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Finding the Fourth Proportional to 514.41, 771.62 and 129.66

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Solution

The fourth proportional to 514.41, 771.62 and 129.66 is: 194.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.41 : 771.62 = 129.66 : x
  2. Step 2: Convert to fraction form
    514.41/771.62 = 129.66/x
  3. Step 3: Cross multiply
    514.41x = 771.62 × 129.66
  4. Step 4: Simplify right side
    514.41x = 100,047.60
  5. Step 5: Solve for x
    x = 100,047.60/514.41
  6. Step 6: Final answer
    x = 194.49

Related Problems

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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.