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Finding the Fourth Proportional to 278.10, 383.72 and 166.12

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Solution

The fourth proportional to 278.10, 383.72 and 166.12 is: 229.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.10 : 383.72 = 166.12 : x
  2. Step 2: Convert to fraction form
    278.10/383.72 = 166.12/x
  3. Step 3: Cross multiply
    278.10x = 383.72 × 166.12
  4. Step 4: Simplify right side
    278.10x = 63,743.57
  5. Step 5: Solve for x
    x = 63,743.57/278.10
  6. Step 6: Final answer
    x = 229.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.