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Finding the Fourth Proportional to 515.66, 773.49 and 191.12

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Solution

The fourth proportional to 515.66, 773.49 and 191.12 is: 286.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.66 : 773.49 = 191.12 : x
  2. Step 2: Convert to fraction form
    515.66/773.49 = 191.12/x
  3. Step 3: Cross multiply
    515.66x = 773.49 × 191.12
  4. Step 4: Simplify right side
    515.66x = 147,829.41
  5. Step 5: Solve for x
    x = 147,829.41/515.66
  6. Step 6: Final answer
    x = 286.68

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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.