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Finding the Fourth Proportional to 35.50, 48.86 and 31.27

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Solution

The fourth proportional to 35.50, 48.86 and 31.27 is: 43.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    35.50 : 48.86 = 31.27 : x
  2. Step 2: Convert to fraction form
    35.50/48.86 = 31.27/x
  3. Step 3: Cross multiply
    35.50x = 48.86 × 31.27
  4. Step 4: Simplify right side
    35.50x = 1,527.85
  5. Step 5: Solve for x
    x = 1,527.85/35.50
  6. Step 6: Final answer
    x = 43.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.