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Finding the Fourth Proportional to 488.62, 733.03 and 257.38

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Solution

The fourth proportional to 488.62, 733.03 and 257.38 is: 386.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.62 : 733.03 = 257.38 : x
  2. Step 2: Convert to fraction form
    488.62/733.03 = 257.38/x
  3. Step 3: Cross multiply
    488.62x = 733.03 × 257.38
  4. Step 4: Simplify right side
    488.62x = 188,667.26
  5. Step 5: Solve for x
    x = 188,667.26/488.62
  6. Step 6: Final answer
    x = 386.12

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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.