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Finding the Fourth Proportional to 610.74, 916.20 and 220.76

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Solution

The fourth proportional to 610.74, 916.20 and 220.76 is: 331.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.74 : 916.20 = 220.76 : x
  2. Step 2: Convert to fraction form
    610.74/916.20 = 220.76/x
  3. Step 3: Cross multiply
    610.74x = 916.20 × 220.76
  4. Step 4: Simplify right side
    610.74x = 202,260.31
  5. Step 5: Solve for x
    x = 202,260.31/610.74
  6. Step 6: Final answer
    x = 331.17

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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.