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Finding the Fourth Proportional to 42.54, 58.69 and 34.36

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Solution

The fourth proportional to 42.54, 58.69 and 34.36 is: 47.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.54 : 58.69 = 34.36 : x
  2. Step 2: Convert to fraction form
    42.54/58.69 = 34.36/x
  3. Step 3: Cross multiply
    42.54x = 58.69 × 34.36
  4. Step 4: Simplify right side
    42.54x = 2,016.59
  5. Step 5: Solve for x
    x = 2,016.59/42.54
  6. Step 6: Final answer
    x = 47.40

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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.