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Finding the Fourth Proportional to 610.50, 915.65 and 220.49

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Solution

The fourth proportional to 610.50, 915.65 and 220.49 is: 330.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.50 : 915.65 = 220.49 : x
  2. Step 2: Convert to fraction form
    610.50/915.65 = 220.49/x
  3. Step 3: Cross multiply
    610.50x = 915.65 × 220.49
  4. Step 4: Simplify right side
    610.50x = 201,891.67
  5. Step 5: Solve for x
    x = 201,891.67/610.50
  6. Step 6: Final answer
    x = 330.70

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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.