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Finding the Fourth Proportional to 510.99, 766.52 and 145.78

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Solution

The fourth proportional to 510.99, 766.52 and 145.78 is: 218.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.99 : 766.52 = 145.78 : x
  2. Step 2: Convert to fraction form
    510.99/766.52 = 145.78/x
  3. Step 3: Cross multiply
    510.99x = 766.52 × 145.78
  4. Step 4: Simplify right side
    510.99x = 111,743.29
  5. Step 5: Solve for x
    x = 111,743.29/510.99
  6. Step 6: Final answer
    x = 218.68

Related Problems

Find fourth proportional to 255.50, 383.26 and 72.89
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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.