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Finding the Fourth Proportional to 52.78, 72.79 and 34.35

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Solution

The fourth proportional to 52.78, 72.79 and 34.35 is: 47.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.78 : 72.79 = 34.35 : x
  2. Step 2: Convert to fraction form
    52.78/72.79 = 34.35/x
  3. Step 3: Cross multiply
    52.78x = 72.79 × 34.35
  4. Step 4: Simplify right side
    52.78x = 2,500.25
  5. Step 5: Solve for x
    x = 2,500.25/52.78
  6. Step 6: Final answer
    x = 47.37

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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.