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Finding the Fourth Proportional to 278.44, 417.45 and 148.43

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Solution

The fourth proportional to 278.44, 417.45 and 148.43 is: 222.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.44 : 417.45 = 148.43 : x
  2. Step 2: Convert to fraction form
    278.44/417.45 = 148.43/x
  3. Step 3: Cross multiply
    278.44x = 417.45 × 148.43
  4. Step 4: Simplify right side
    278.44x = 61,963.70
  5. Step 5: Solve for x
    x = 61,963.70/278.44
  6. Step 6: Final answer
    x = 222.54

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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.