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Finding the Fourth Proportional to 424.81, 637.39 and 251.56

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Solution

The fourth proportional to 424.81, 637.39 and 251.56 is: 377.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.81 : 637.39 = 251.56 : x
  2. Step 2: Convert to fraction form
    424.81/637.39 = 251.56/x
  3. Step 3: Cross multiply
    424.81x = 637.39 × 251.56
  4. Step 4: Simplify right side
    424.81x = 160,338.64
  5. Step 5: Solve for x
    x = 160,338.64/424.81
  6. Step 6: Final answer
    x = 377.44

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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.