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Finding the Fourth Proportional to 70.49, 97.28 and 39.41

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Solution

The fourth proportional to 70.49, 97.28 and 39.41 is: 54.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.49 : 97.28 = 39.41 : x
  2. Step 2: Convert to fraction form
    70.49/97.28 = 39.41/x
  3. Step 3: Cross multiply
    70.49x = 97.28 × 39.41
  4. Step 4: Simplify right side
    70.49x = 3,833.39
  5. Step 5: Solve for x
    x = 3,833.39/70.49
  6. Step 6: Final answer
    x = 54.38

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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.