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Finding the Fourth Proportional to 52.75, 72.79 and 30.62

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Solution

The fourth proportional to 52.75, 72.79 and 30.62 is: 42.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.75 : 72.79 = 30.62 : x
  2. Step 2: Convert to fraction form
    52.75/72.79 = 30.62/x
  3. Step 3: Cross multiply
    52.75x = 72.79 × 30.62
  4. Step 4: Simplify right side
    52.75x = 2,228.31
  5. Step 5: Solve for x
    x = 2,228.31/52.75
  6. Step 6: Final answer
    x = 42.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.