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Finding the Fourth Proportional to 42.72, 58.51 and 41.64

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Solution

The fourth proportional to 42.72, 58.51 and 41.64 is: 57.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.72 : 58.51 = 41.64 : x
  2. Step 2: Convert to fraction form
    42.72/58.51 = 41.64/x
  3. Step 3: Cross multiply
    42.72x = 58.51 × 41.64
  4. Step 4: Simplify right side
    42.72x = 2,436.36
  5. Step 5: Solve for x
    x = 2,436.36/42.72
  6. Step 6: Final answer
    x = 57.03

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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.