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Finding the Fourth Proportional to 610.43, 915.53 and 220.34

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Solution

The fourth proportional to 610.43, 915.53 and 220.34 is: 330.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.43 : 915.53 = 220.34 : x
  2. Step 2: Convert to fraction form
    610.43/915.53 = 220.34/x
  3. Step 3: Cross multiply
    610.43x = 915.53 × 220.34
  4. Step 4: Simplify right side
    610.43x = 201,729.07
  5. Step 5: Solve for x
    x = 201,729.07/610.43
  6. Step 6: Final answer
    x = 330.47

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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.