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Finding the Fourth Proportional to 511.50, 767.15 and 146.21

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Solution

The fourth proportional to 511.50, 767.15 and 146.21 is: 219.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.50 : 767.15 = 146.21 : x
  2. Step 2: Convert to fraction form
    511.50/767.15 = 146.21/x
  3. Step 3: Cross multiply
    511.50x = 767.15 × 146.21
  4. Step 4: Simplify right side
    511.50x = 112,162.73
  5. Step 5: Solve for x
    x = 112,162.73/511.50
  6. Step 6: Final answer
    x = 219.28

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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.