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Finding the Fourth Proportional to 52.58, 72.53 and 30.74

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Solution

The fourth proportional to 52.58, 72.53 and 30.74 is: 42.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.58 : 72.53 = 30.74 : x
  2. Step 2: Convert to fraction form
    52.58/72.53 = 30.74/x
  3. Step 3: Cross multiply
    52.58x = 72.53 × 30.74
  4. Step 4: Simplify right side
    52.58x = 2,229.57
  5. Step 5: Solve for x
    x = 2,229.57/52.58
  6. Step 6: Final answer
    x = 42.41

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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.