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Finding the Fourth Proportional to 278.17, 417.31 and 124.23

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Solution

The fourth proportional to 278.17, 417.31 and 124.23 is: 186.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.17 : 417.31 = 124.23 : x
  2. Step 2: Convert to fraction form
    278.17/417.31 = 124.23/x
  3. Step 3: Cross multiply
    278.17x = 417.31 × 124.23
  4. Step 4: Simplify right side
    278.17x = 51,842.42
  5. Step 5: Solve for x
    x = 51,842.42/278.17
  6. Step 6: Final answer
    x = 186.37

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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.