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Finding the Fourth Proportional to 424.84, 637.28 and 136.25

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Solution

The fourth proportional to 424.84, 637.28 and 136.25 is: 204.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.84 : 637.28 = 136.25 : x
  2. Step 2: Convert to fraction form
    424.84/637.28 = 136.25/x
  3. Step 3: Cross multiply
    424.84x = 637.28 × 136.25
  4. Step 4: Simplify right side
    424.84x = 86,829.40
  5. Step 5: Solve for x
    x = 86,829.40/424.84
  6. Step 6: Final answer
    x = 204.38

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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.