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Finding the Fourth Proportional to 37.56, 56 and 31.80

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Solution

The fourth proportional to 37.56, 56 and 31.80 is: 47.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.56 : 56 = 31.80 : x
  2. Step 2: Convert to fraction form
    37.56/56 = 31.80/x
  3. Step 3: Cross multiply
    37.56x = 56 × 31.80
  4. Step 4: Simplify right side
    37.56x = 1,780.80
  5. Step 5: Solve for x
    x = 1,780.80/37.56
  6. Step 6: Final answer
    x = 47.41

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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.