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Finding the Fourth Proportional to 279.52, 419.28 and 135.04

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Solution

The fourth proportional to 279.52, 419.28 and 135.04 is: 202.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.52 : 419.28 = 135.04 : x
  2. Step 2: Convert to fraction form
    279.52/419.28 = 135.04/x
  3. Step 3: Cross multiply
    279.52x = 419.28 × 135.04
  4. Step 4: Simplify right side
    279.52x = 56,619.57
  5. Step 5: Solve for x
    x = 56,619.57/279.52
  6. Step 6: Final answer
    x = 202.56

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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.