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Finding the Fourth Proportional to 610.84, 915.70 and 220.75

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Solution

The fourth proportional to 610.84, 915.70 and 220.75 is: 330.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.84 : 915.70 = 220.75 : x
  2. Step 2: Convert to fraction form
    610.84/915.70 = 220.75/x
  3. Step 3: Cross multiply
    610.84x = 915.70 × 220.75
  4. Step 4: Simplify right side
    610.84x = 202,135.09
  5. Step 5: Solve for x
    x = 202,135.09/610.84
  6. Step 6: Final answer
    x = 330.92

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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.