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Finding the Fourth Proportional to 510.79, 766.21 and 186.15

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Solution

The fourth proportional to 510.79, 766.21 and 186.15 is: 279.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    510.79 : 766.21 = 186.15 : x
  2. Step 2: Convert to fraction form
    510.79/766.21 = 186.15/x
  3. Step 3: Cross multiply
    510.79x = 766.21 × 186.15
  4. Step 4: Simplify right side
    510.79x = 142,626.16
  5. Step 5: Solve for x
    x = 142,626.16/510.79
  6. Step 6: Final answer
    x = 279.23

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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.