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Finding the Fourth Proportional to 279.19, 417.72 and 169.54

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Solution

The fourth proportional to 279.19, 417.72 and 169.54 is: 253.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.19 : 417.72 = 169.54 : x
  2. Step 2: Convert to fraction form
    279.19/417.72 = 169.54/x
  3. Step 3: Cross multiply
    279.19x = 417.72 × 169.54
  4. Step 4: Simplify right side
    279.19x = 70,819.84
  5. Step 5: Solve for x
    x = 70,819.84/279.19
  6. Step 6: Final answer
    x = 253.66

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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.