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Finding the Fourth Proportional to 279.44, 417.28 and 228.18

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Solution

The fourth proportional to 279.44, 417.28 and 228.18 is: 340.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.44 : 417.28 = 228.18 : x
  2. Step 2: Convert to fraction form
    279.44/417.28 = 228.18/x
  3. Step 3: Cross multiply
    279.44x = 417.28 × 228.18
  4. Step 4: Simplify right side
    279.44x = 95,216.80
  5. Step 5: Solve for x
    x = 95,216.80/279.44
  6. Step 6: Final answer
    x = 340.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.