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Finding the Fourth Proportional to 278.03, 417.05 and 169.70

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Solution

The fourth proportional to 278.03, 417.05 and 169.70 is: 254.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.03 : 417.05 = 169.70 : x
  2. Step 2: Convert to fraction form
    278.03/417.05 = 169.70/x
  3. Step 3: Cross multiply
    278.03x = 417.05 × 169.70
  4. Step 4: Simplify right side
    278.03x = 70,771.09
  5. Step 5: Solve for x
    x = 70,771.09/278.03
  6. Step 6: Final answer
    x = 254.54

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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.