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Finding the Fourth Proportional to 663.30, 916.16 and 441.90

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Solution

The fourth proportional to 663.30, 916.16 and 441.90 is: 610.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.30 : 916.16 = 441.90 : x
  2. Step 2: Convert to fraction form
    663.30/916.16 = 441.90/x
  3. Step 3: Cross multiply
    663.30x = 916.16 × 441.90
  4. Step 4: Simplify right side
    663.30x = 404,848.89
  5. Step 5: Solve for x
    x = 404,848.89/663.30
  6. Step 6: Final answer
    x = 610.36

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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.