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Finding the Fourth Proportional to 42.18, 58.22 and 23.77

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Solution

The fourth proportional to 42.18, 58.22 and 23.77 is: 32.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.18 : 58.22 = 23.77 : x
  2. Step 2: Convert to fraction form
    42.18/58.22 = 23.77/x
  3. Step 3: Cross multiply
    42.18x = 58.22 × 23.77
  4. Step 4: Simplify right side
    42.18x = 1,383.69
  5. Step 5: Solve for x
    x = 1,383.69/42.18
  6. Step 6: Final answer
    x = 32.80

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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.