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Finding the Fourth Proportional to 663.05, 915.79 and 441.61

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Solution

The fourth proportional to 663.05, 915.79 and 441.61 is: 609.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.05 : 915.79 = 441.61 : x
  2. Step 2: Convert to fraction form
    663.05/915.79 = 441.61/x
  3. Step 3: Cross multiply
    663.05x = 915.79 × 441.61
  4. Step 4: Simplify right side
    663.05x = 404,422.02
  5. Step 5: Solve for x
    x = 404,422.02/663.05
  6. Step 6: Final answer
    x = 609.94

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.