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Finding the Fourth Proportional to 610.56, 915.84 and 394.29

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Solution

The fourth proportional to 610.56, 915.84 and 394.29 is: 591.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.56 : 915.84 = 394.29 : x
  2. Step 2: Convert to fraction form
    610.56/915.84 = 394.29/x
  3. Step 3: Cross multiply
    610.56x = 915.84 × 394.29
  4. Step 4: Simplify right side
    610.56x = 361,106.55
  5. Step 5: Solve for x
    x = 361,106.55/610.56
  6. Step 6: Final answer
    x = 591.44

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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.