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Finding the Fourth Proportional to 42.28, 58.28 and 35.36

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Solution

The fourth proportional to 42.28, 58.28 and 35.36 is: 48.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.28 : 58.28 = 35.36 : x
  2. Step 2: Convert to fraction form
    42.28/58.28 = 35.36/x
  3. Step 3: Cross multiply
    42.28x = 58.28 × 35.36
  4. Step 4: Simplify right side
    42.28x = 2,060.78
  5. Step 5: Solve for x
    x = 2,060.78/42.28
  6. Step 6: Final answer
    x = 48.74

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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.