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Finding the Fourth Proportional to 37.05, 55.26 and 31.38

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Solution

The fourth proportional to 37.05, 55.26 and 31.38 is: 46.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.05 : 55.26 = 31.38 : x
  2. Step 2: Convert to fraction form
    37.05/55.26 = 31.38/x
  3. Step 3: Cross multiply
    37.05x = 55.26 × 31.38
  4. Step 4: Simplify right side
    37.05x = 1,734.06
  5. Step 5: Solve for x
    x = 1,734.06/37.05
  6. Step 6: Final answer
    x = 46.80

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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.