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Finding the Fourth Proportional to 38.98, 58.12 and 36.70

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Solution

The fourth proportional to 38.98, 58.12 and 36.70 is: 54.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.98 : 58.12 = 36.70 : x
  2. Step 2: Convert to fraction form
    38.98/58.12 = 36.70/x
  3. Step 3: Cross multiply
    38.98x = 58.12 × 36.70
  4. Step 4: Simplify right side
    38.98x = 2,133.00
  5. Step 5: Solve for x
    x = 2,133.00/38.98
  6. Step 6: Final answer
    x = 54.72

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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.