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Finding the Fourth Proportional to 255.54, 354.12 and 240.15

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Solution

The fourth proportional to 255.54, 354.12 and 240.15 is: 332.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.54 : 354.12 = 240.15 : x
  2. Step 2: Convert to fraction form
    255.54/354.12 = 240.15/x
  3. Step 3: Cross multiply
    255.54x = 354.12 × 240.15
  4. Step 4: Simplify right side
    255.54x = 85,041.92
  5. Step 5: Solve for x
    x = 85,041.92/255.54
  6. Step 6: Final answer
    x = 332.79

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.