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Finding the Fourth Proportional to 278.02, 416.76 and 115.48

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Solution

The fourth proportional to 278.02, 416.76 and 115.48 is: 173.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    278.02 : 416.76 = 115.48 : x
  2. Step 2: Convert to fraction form
    278.02/416.76 = 115.48/x
  3. Step 3: Cross multiply
    278.02x = 416.76 × 115.48
  4. Step 4: Simplify right side
    278.02x = 48,127.44
  5. Step 5: Solve for x
    x = 48,127.44/278.02
  6. Step 6: Final answer
    x = 173.11

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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.