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Finding the Fourth Proportional to 278.44, 417.43 and 248.07

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Solution

The fourth proportional to 278.44, 417.43 and 248.07 is: 371.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.44 : 417.43 = 248.07 : x
  2. Step 2: Convert to fraction form
    278.44/417.43 = 248.07/x
  3. Step 3: Cross multiply
    278.44x = 417.43 × 248.07
  4. Step 4: Simplify right side
    278.44x = 103,551.86
  5. Step 5: Solve for x
    x = 103,551.86/278.44
  6. Step 6: Final answer
    x = 371.90

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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.