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Finding the Fourth Proportional to 277.50, 415.50 and 147.22

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Solution

The fourth proportional to 277.50, 415.50 and 147.22 is: 220.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    277.50 : 415.50 = 147.22 : x
  2. Step 2: Convert to fraction form
    277.50/415.50 = 147.22/x
  3. Step 3: Cross multiply
    277.50x = 415.50 × 147.22
  4. Step 4: Simplify right side
    277.50x = 61,169.91
  5. Step 5: Solve for x
    x = 61,169.91/277.50
  6. Step 6: Final answer
    x = 220.43

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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.