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Finding the Fourth Proportional to 37.40, 55.90 and 28.28

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Solution

The fourth proportional to 37.40, 55.90 and 28.28 is: 42.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    37.40 : 55.90 = 28.28 : x
  2. Step 2: Convert to fraction form
    37.40/55.90 = 28.28/x
  3. Step 3: Cross multiply
    37.40x = 55.90 × 28.28
  4. Step 4: Simplify right side
    37.40x = 1,580.85
  5. Step 5: Solve for x
    x = 1,580.85/37.40
  6. Step 6: Final answer
    x = 42.27

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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.