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Finding the Fourth Proportional to 488.73, 732.69 and 257.49

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Solution

The fourth proportional to 488.73, 732.69 and 257.49 is: 386.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.73 : 732.69 = 257.49 : x
  2. Step 2: Convert to fraction form
    488.73/732.69 = 257.49/x
  3. Step 3: Cross multiply
    488.73x = 732.69 × 257.49
  4. Step 4: Simplify right side
    488.73x = 188,660.35
  5. Step 5: Solve for x
    x = 188,660.35/488.73
  6. Step 6: Final answer
    x = 386.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.