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Finding the Fourth Proportional to 52.68, 72.64 and 38.89

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Solution

The fourth proportional to 52.68, 72.64 and 38.89 is: 53.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.68 : 72.64 = 38.89 : x
  2. Step 2: Convert to fraction form
    52.68/72.64 = 38.89/x
  3. Step 3: Cross multiply
    52.68x = 72.64 × 38.89
  4. Step 4: Simplify right side
    52.68x = 2,824.80
  5. Step 5: Solve for x
    x = 2,824.80/52.68
  6. Step 6: Final answer
    x = 53.63

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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.