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Finding the Fourth Proportional to 610.12, 915.18 and 220.18

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Solution

The fourth proportional to 610.12, 915.18 and 220.18 is: 330.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.12 : 915.18 = 220.18 : x
  2. Step 2: Convert to fraction form
    610.12/915.18 = 220.18/x
  3. Step 3: Cross multiply
    610.12x = 915.18 × 220.18
  4. Step 4: Simplify right side
    610.12x = 201,499.76
  5. Step 5: Solve for x
    x = 201,499.76/610.12
  6. Step 6: Final answer
    x = 330.26

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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.