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Finding the Fourth Proportional to 34.71, 47.75 and 30.62

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Solution

The fourth proportional to 34.71, 47.75 and 30.62 is: 42.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    34.71 : 47.75 = 30.62 : x
  2. Step 2: Convert to fraction form
    34.71/47.75 = 30.62/x
  3. Step 3: Cross multiply
    34.71x = 47.75 × 30.62
  4. Step 4: Simplify right side
    34.71x = 1,462.11
  5. Step 5: Solve for x
    x = 1,462.11/34.71
  6. Step 6: Final answer
    x = 42.12

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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.