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Finding the Fourth Proportional to 47.30, 71.25 and 40.23

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Solution

The fourth proportional to 47.30, 71.25 and 40.23 is: 60.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.30 : 71.25 = 40.23 : x
  2. Step 2: Convert to fraction form
    47.30/71.25 = 40.23/x
  3. Step 3: Cross multiply
    47.30x = 71.25 × 40.23
  4. Step 4: Simplify right side
    47.30x = 2,866.39
  5. Step 5: Solve for x
    x = 2,866.39/47.30
  6. Step 6: Final answer
    x = 60.61

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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.