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Finding the Fourth Proportional to 38.18, 56.91 and 37.77

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Solution

The fourth proportional to 38.18, 56.91 and 37.77 is: 56.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.18 : 56.91 = 37.77 : x
  2. Step 2: Convert to fraction form
    38.18/56.91 = 37.77/x
  3. Step 3: Cross multiply
    38.18x = 56.91 × 37.77
  4. Step 4: Simplify right side
    38.18x = 2,149.49
  5. Step 5: Solve for x
    x = 2,149.49/38.18
  6. Step 6: Final answer
    x = 56.31

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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.