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Finding the Fourth Proportional to 510.35, 765.55 and 145.13

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Solution

The fourth proportional to 510.35, 765.55 and 145.13 is: 217.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.35 : 765.55 = 145.13 : x
  2. Step 2: Convert to fraction form
    510.35/765.55 = 145.13/x
  3. Step 3: Cross multiply
    510.35x = 765.55 × 145.13
  4. Step 4: Simplify right side
    510.35x = 111,104.27
  5. Step 5: Solve for x
    x = 111,104.27/510.35
  6. Step 6: Final answer
    x = 217.70

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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.