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Finding the Fourth Proportional to 510.85, 766.31 and 145.66

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Solution

The fourth proportional to 510.85, 766.31 and 145.66 is: 218.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.85 : 766.31 = 145.66 : x
  2. Step 2: Convert to fraction form
    510.85/766.31 = 145.66/x
  3. Step 3: Cross multiply
    510.85x = 766.31 × 145.66
  4. Step 4: Simplify right side
    510.85x = 111,620.71
  5. Step 5: Solve for x
    x = 111,620.71/510.85
  6. Step 6: Final answer
    x = 218.50

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.