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Finding the Fourth Proportional to 663.08, 915.24 and 414.56

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Solution

The fourth proportional to 663.08, 915.24 and 414.56 is: 572.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.08 : 915.24 = 414.56 : x
  2. Step 2: Convert to fraction form
    663.08/915.24 = 414.56/x
  3. Step 3: Cross multiply
    663.08x = 915.24 × 414.56
  4. Step 4: Simplify right side
    663.08x = 379,421.89
  5. Step 5: Solve for x
    x = 379,421.89/663.08
  6. Step 6: Final answer
    x = 572.21

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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.