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Finding the Fourth Proportional to 277.15, 415.65 and 114.88

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Solution

The fourth proportional to 277.15, 415.65 and 114.88 is: 172.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.15 : 415.65 = 114.88 : x
  2. Step 2: Convert to fraction form
    277.15/415.65 = 114.88/x
  3. Step 3: Cross multiply
    277.15x = 415.65 × 114.88
  4. Step 4: Simplify right side
    277.15x = 47,747.79
  5. Step 5: Solve for x
    x = 47,747.79/277.15
  6. Step 6: Final answer
    x = 172.28

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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.