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Finding the Fourth Proportional to 52.40, 72.24 and 49.62

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Solution

The fourth proportional to 52.40, 72.24 and 49.62 is: 68.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.40 : 72.24 = 49.62 : x
  2. Step 2: Convert to fraction form
    52.40/72.24 = 49.62/x
  3. Step 3: Cross multiply
    52.40x = 72.24 × 49.62
  4. Step 4: Simplify right side
    52.40x = 3,584.55
  5. Step 5: Solve for x
    x = 3,584.55/52.40
  6. Step 6: Final answer
    x = 68.41

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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.