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Finding the Fourth Proportional to 488.57, 733.16 and 257.63

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Solution

The fourth proportional to 488.57, 733.16 and 257.63 is: 386.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.57 : 733.16 = 257.63 : x
  2. Step 2: Convert to fraction form
    488.57/733.16 = 257.63/x
  3. Step 3: Cross multiply
    488.57x = 733.16 × 257.63
  4. Step 4: Simplify right side
    488.57x = 188,879.06
  5. Step 5: Solve for x
    x = 188,879.06/488.57
  6. Step 6: Final answer
    x = 386.59

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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.