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Finding the Fourth Proportional to 37.94, 56.68 and 31.87

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Solution

The fourth proportional to 37.94, 56.68 and 31.87 is: 47.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.94 : 56.68 = 31.87 : x
  2. Step 2: Convert to fraction form
    37.94/56.68 = 31.87/x
  3. Step 3: Cross multiply
    37.94x = 56.68 × 31.87
  4. Step 4: Simplify right side
    37.94x = 1,805.95
  5. Step 5: Solve for x
    x = 1,805.95/37.94
  6. Step 6: Final answer
    x = 47.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.