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Finding the Fourth Proportional to 488.75, 733.58 and 257.81

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Solution

The fourth proportional to 488.75, 733.58 and 257.81 is: 386.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.75 : 733.58 = 257.81 : x
  2. Step 2: Convert to fraction form
    488.75/733.58 = 257.81/x
  3. Step 3: Cross multiply
    488.75x = 733.58 × 257.81
  4. Step 4: Simplify right side
    488.75x = 189,124.26
  5. Step 5: Solve for x
    x = 189,124.26/488.75
  6. Step 6: Final answer
    x = 386.96

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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.