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Finding the Fourth Proportional to 487.29, 730.66 and 255.61

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Solution

The fourth proportional to 487.29, 730.66 and 255.61 is: 383.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.29 : 730.66 = 255.61 : x
  2. Step 2: Convert to fraction form
    487.29/730.66 = 255.61/x
  3. Step 3: Cross multiply
    487.29x = 730.66 × 255.61
  4. Step 4: Simplify right side
    487.29x = 186,764.00
  5. Step 5: Solve for x
    x = 186,764.00/487.29
  6. Step 6: Final answer
    x = 383.27

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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.