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Finding the Fourth Proportional to 277.30, 416.15 and 115.10

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Solution

The fourth proportional to 277.30, 416.15 and 115.10 is: 172.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.30 : 416.15 = 115.10 : x
  2. Step 2: Convert to fraction form
    277.30/416.15 = 115.10/x
  3. Step 3: Cross multiply
    277.30x = 416.15 × 115.10
  4. Step 4: Simplify right side
    277.30x = 47,898.87
  5. Step 5: Solve for x
    x = 47,898.87/277.30
  6. Step 6: Final answer
    x = 172.73

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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.