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Finding the Fourth Proportional to 510.98, 766.46 and 145.80

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Solution

The fourth proportional to 510.98, 766.46 and 145.80 is: 218.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.98 : 766.46 = 145.80 : x
  2. Step 2: Convert to fraction form
    510.98/766.46 = 145.80/x
  3. Step 3: Cross multiply
    510.98x = 766.46 × 145.80
  4. Step 4: Simplify right side
    510.98x = 111,749.87
  5. Step 5: Solve for x
    x = 111,749.87/510.98
  6. Step 6: Final answer
    x = 218.70

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Double scale
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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.