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Finding the Fourth Proportional to 42, 57.76 and 36.52

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Solution

The fourth proportional to 42, 57.76 and 36.52 is: 50.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    42 : 57.76 = 36.52 : x
  2. Step 2: Convert to fraction form
    42/57.76 = 36.52/x
  3. Step 3: Cross multiply
    42x = 57.76 × 36.52
  4. Step 4: Simplify right side
    42x = 2,109.40
  5. Step 5: Solve for x
    x = 2,109.40/42
  6. Step 6: Final answer
    x = 50.22

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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.