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Finding the Fourth Proportional to 610.91, 915.99 and 416.15

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Solution

The fourth proportional to 610.91, 915.99 and 416.15 is: 623.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.91 : 915.99 = 416.15 : x
  2. Step 2: Convert to fraction form
    610.91/915.99 = 416.15/x
  3. Step 3: Cross multiply
    610.91x = 915.99 × 416.15
  4. Step 4: Simplify right side
    610.91x = 381,184.66
  5. Step 5: Solve for x
    x = 381,184.66/610.91
  6. Step 6: Final answer
    x = 623.97

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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.