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Finding the Fourth Proportional to 510.31, 765.35 and 145.01

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Solution

The fourth proportional to 510.31, 765.35 and 145.01 is: 217.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.31 : 765.35 = 145.01 : x
  2. Step 2: Convert to fraction form
    510.31/765.35 = 145.01/x
  3. Step 3: Cross multiply
    510.31x = 765.35 × 145.01
  4. Step 4: Simplify right side
    510.31x = 110,978.85
  5. Step 5: Solve for x
    x = 110,978.85/510.31
  6. Step 6: Final answer
    x = 217.47

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Double scale
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Similar ratio
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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.