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Finding the Fourth Proportional to 510.71, 766.19 and 186.11

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Solution

The fourth proportional to 510.71, 766.19 and 186.11 is: 279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.71 : 766.19 = 186.11 : x
  2. Step 2: Convert to fraction form
    510.71/766.19 = 186.11/x
  3. Step 3: Cross multiply
    510.71x = 766.19 × 186.11
  4. Step 4: Simplify right side
    510.71x = 142,592.26
  5. Step 5: Solve for x
    x = 142,592.26/510.71
  6. Step 6: Final answer
    x = 279.21

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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.