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Finding the Fourth Proportional to 279.18, 418.64 and 96.39

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Solution

The fourth proportional to 279.18, 418.64 and 96.39 is: 144.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.18 : 418.64 = 96.39 : x
  2. Step 2: Convert to fraction form
    279.18/418.64 = 96.39/x
  3. Step 3: Cross multiply
    279.18x = 418.64 × 96.39
  4. Step 4: Simplify right side
    279.18x = 40,352.23
  5. Step 5: Solve for x
    x = 40,352.23/279.18
  6. Step 6: Final answer
    x = 144.54

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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.