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Finding the Fourth Proportional to 52.22, 78.41 and 51.31

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Solution

The fourth proportional to 52.22, 78.41 and 51.31 is: 77.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.22 : 78.41 = 51.31 : x
  2. Step 2: Convert to fraction form
    52.22/78.41 = 51.31/x
  3. Step 3: Cross multiply
    52.22x = 78.41 × 51.31
  4. Step 4: Simplify right side
    52.22x = 4,023.22
  5. Step 5: Solve for x
    x = 4,023.22/52.22
  6. Step 6: Final answer
    x = 77.04

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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.