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Finding the Fourth Proportional to 512.70, 769.05 and 491.10

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Solution

The fourth proportional to 512.70, 769.05 and 491.10 is: 736.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.70 : 769.05 = 491.10 : x
  2. Step 2: Convert to fraction form
    512.70/769.05 = 491.10/x
  3. Step 3: Cross multiply
    512.70x = 769.05 × 491.10
  4. Step 4: Simplify right side
    512.70x = 377,680.46
  5. Step 5: Solve for x
    x = 377,680.46/512.70
  6. Step 6: Final answer
    x = 736.65

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.