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Finding the Fourth Proportional to 663.55, 915.92 and 467.11

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Solution

The fourth proportional to 663.55, 915.92 and 467.11 is: 644.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.55 : 915.92 = 467.11 : x
  2. Step 2: Convert to fraction form
    663.55/915.92 = 467.11/x
  3. Step 3: Cross multiply
    663.55x = 915.92 × 467.11
  4. Step 4: Simplify right side
    663.55x = 427,835.39
  5. Step 5: Solve for x
    x = 427,835.39/663.55
  6. Step 6: Final answer
    x = 644.77

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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.