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Finding the Fourth Proportional to 42.57, 58.53 and 35.28

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Solution

The fourth proportional to 42.57, 58.53 and 35.28 is: 48.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.57 : 58.53 = 35.28 : x
  2. Step 2: Convert to fraction form
    42.57/58.53 = 35.28/x
  3. Step 3: Cross multiply
    42.57x = 58.53 × 35.28
  4. Step 4: Simplify right side
    42.57x = 2,064.94
  5. Step 5: Solve for x
    x = 2,064.94/42.57
  6. Step 6: Final answer
    x = 48.51

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.