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Finding the Fourth Proportional to 52.44, 78.62 and 38.92

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Solution

The fourth proportional to 52.44, 78.62 and 38.92 is: 58.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.44 : 78.62 = 38.92 : x
  2. Step 2: Convert to fraction form
    52.44/78.62 = 38.92/x
  3. Step 3: Cross multiply
    52.44x = 78.62 × 38.92
  4. Step 4: Simplify right side
    52.44x = 3,059.89
  5. Step 5: Solve for x
    x = 3,059.89/52.44
  6. Step 6: Final answer
    x = 58.35

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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.