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Finding the Fourth Proportional to 663.24, 915.26 and 383.47

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Solution

The fourth proportional to 663.24, 915.26 and 383.47 is: 529.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    663.24 : 915.26 = 383.47 : x
  2. Step 2: Convert to fraction form
    663.24/915.26 = 383.47/x
  3. Step 3: Cross multiply
    663.24x = 915.26 × 383.47
  4. Step 4: Simplify right side
    663.24x = 350,974.75
  5. Step 5: Solve for x
    x = 350,974.75/663.24
  6. Step 6: Final answer
    x = 529.18

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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.