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Finding the Fourth Proportional to 38.98, 58.56 and 37.72

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Solution

The fourth proportional to 38.98, 58.56 and 37.72 is: 56.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.98 : 58.56 = 37.72 : x
  2. Step 2: Convert to fraction form
    38.98/58.56 = 37.72/x
  3. Step 3: Cross multiply
    38.98x = 58.56 × 37.72
  4. Step 4: Simplify right side
    38.98x = 2,208.88
  5. Step 5: Solve for x
    x = 2,208.88/38.98
  6. Step 6: Final answer
    x = 56.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.