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Finding the Fourth Proportional to 511.80, 766.71 and 396.18

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Solution

The fourth proportional to 511.80, 766.71 and 396.18 is: 593.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.80 : 766.71 = 396.18 : x
  2. Step 2: Convert to fraction form
    511.80/766.71 = 396.18/x
  3. Step 3: Cross multiply
    511.80x = 766.71 × 396.18
  4. Step 4: Simplify right side
    511.80x = 303,755.17
  5. Step 5: Solve for x
    x = 303,755.17/511.80
  6. Step 6: Final answer
    x = 593.50

Related Problems

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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.