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Finding the Fourth Proportional to 424.78, 637.30 and 150.90

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Solution

The fourth proportional to 424.78, 637.30 and 150.90 is: 226.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.78 : 637.30 = 150.90 : x
  2. Step 2: Convert to fraction form
    424.78/637.30 = 150.90/x
  3. Step 3: Cross multiply
    424.78x = 637.30 × 150.90
  4. Step 4: Simplify right side
    424.78x = 96,168.57
  5. Step 5: Solve for x
    x = 96,168.57/424.78
  6. Step 6: Final answer
    x = 226.40

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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.