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Finding the Fourth Proportional to 424.96, 637.44 and 136.40

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Solution

The fourth proportional to 424.96, 637.44 and 136.40 is: 204.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.96 : 637.44 = 136.40 : x
  2. Step 2: Convert to fraction form
    424.96/637.44 = 136.40/x
  3. Step 3: Cross multiply
    424.96x = 637.44 × 136.40
  4. Step 4: Simplify right side
    424.96x = 86,943.63
  5. Step 5: Solve for x
    x = 86,943.63/424.96
  6. Step 6: Final answer
    x = 204.59

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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.