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Finding the Fourth Proportional to 510.94, 766.40 and 145.75

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Solution

The fourth proportional to 510.94, 766.40 and 145.75 is: 218.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.94 : 766.40 = 145.75 : x
  2. Step 2: Convert to fraction form
    510.94/766.40 = 145.75/x
  3. Step 3: Cross multiply
    510.94x = 766.40 × 145.75
  4. Step 4: Simplify right side
    510.94x = 111,702.80
  5. Step 5: Solve for x
    x = 111,702.80/510.94
  6. Step 6: Final answer
    x = 218.62

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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.