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Finding the Fourth Proportional to 282.84, 424.26 and 138.60

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Solution

The fourth proportional to 282.84, 424.26 and 138.60 is: 207.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    282.84 : 424.26 = 138.60 : x
  2. Step 2: Convert to fraction form
    282.84/424.26 = 138.60/x
  3. Step 3: Cross multiply
    282.84x = 424.26 × 138.60
  4. Step 4: Simplify right side
    282.84x = 58,802.44
  5. Step 5: Solve for x
    x = 58,802.44/282.84
  6. Step 6: Final answer
    x = 207.90

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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.