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Finding the Fourth Proportional to 486.93, 730.48 and 255.88

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Solution

The fourth proportional to 486.93, 730.48 and 255.88 is: 383.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.93 : 730.48 = 255.88 : x
  2. Step 2: Convert to fraction form
    486.93/730.48 = 255.88/x
  3. Step 3: Cross multiply
    486.93x = 730.48 × 255.88
  4. Step 4: Simplify right side
    486.93x = 186,917.31
  5. Step 5: Solve for x
    x = 186,917.31/486.93
  6. Step 6: Final answer
    x = 383.87

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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.