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Finding the Fourth Proportional to 510.75, 766.25 and 168.75

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Solution

The fourth proportional to 510.75, 766.25 and 168.75 is: 253.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.75 : 766.25 = 168.75 : x
  2. Step 2: Convert to fraction form
    510.75/766.25 = 168.75/x
  3. Step 3: Cross multiply
    510.75x = 766.25 × 168.75
  4. Step 4: Simplify right side
    510.75x = 129,303.84
  5. Step 5: Solve for x
    x = 129,303.84/510.75
  6. Step 6: Final answer
    x = 253.16

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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.