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Finding the Fourth Proportional to 34.75, 52.37 and 31.39

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Solution

The fourth proportional to 34.75, 52.37 and 31.39 is: 47.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.75 : 52.37 = 31.39 : x
  2. Step 2: Convert to fraction form
    34.75/52.37 = 31.39/x
  3. Step 3: Cross multiply
    34.75x = 52.37 × 31.39
  4. Step 4: Simplify right side
    34.75x = 1,643.89
  5. Step 5: Solve for x
    x = 1,643.89/34.75
  6. Step 6: Final answer
    x = 47.31

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.