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Finding the Fourth Proportional to 915.48, 1,372.73 and 330.44

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Solution

The fourth proportional to 915.48, 1,372.73 and 330.44 is: 495.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.48 : 1,372.73 = 330.44 : x
  2. Step 2: Convert to fraction form
    915.48/1,372.73 = 330.44/x
  3. Step 3: Cross multiply
    915.48x = 1,372.73 × 330.44
  4. Step 4: Simplify right side
    915.48x = 453,596.39
  5. Step 5: Solve for x
    x = 453,596.39/915.48
  6. Step 6: Final answer
    x = 495.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.