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Finding the Fourth Proportional to 52.81, 72.47 and 52.30

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Solution

The fourth proportional to 52.81, 72.47 and 52.30 is: 71.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.81 : 72.47 = 52.30 : x
  2. Step 2: Convert to fraction form
    52.81/72.47 = 52.30/x
  3. Step 3: Cross multiply
    52.81x = 72.47 × 52.30
  4. Step 4: Simplify right side
    52.81x = 3,789.93
  5. Step 5: Solve for x
    x = 3,789.93/52.81
  6. Step 6: Final answer
    x = 71.76

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.