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Finding the Fourth Proportional to 52.25, 78.23 and 49.21

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Solution

The fourth proportional to 52.25, 78.23 and 49.21 is: 73.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.25 : 78.23 = 49.21 : x
  2. Step 2: Convert to fraction form
    52.25/78.23 = 49.21/x
  3. Step 3: Cross multiply
    52.25x = 78.23 × 49.21
  4. Step 4: Simplify right side
    52.25x = 3,849.63
  5. Step 5: Solve for x
    x = 3,849.63/52.25
  6. Step 6: Final answer
    x = 73.68

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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.