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Finding the Fourth Proportional to 400.48, 600.30 and 255.76

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Solution

The fourth proportional to 400.48, 600.30 and 255.76 is: 383.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.48 : 600.30 = 255.76 : x
  2. Step 2: Convert to fraction form
    400.48/600.30 = 255.76/x
  3. Step 3: Cross multiply
    400.48x = 600.30 × 255.76
  4. Step 4: Simplify right side
    400.48x = 153,532.73
  5. Step 5: Solve for x
    x = 153,532.73/400.48
  6. Step 6: Final answer
    x = 383.37

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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.