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Finding the Fourth Proportional to 437.25, 656.78 and 255.00

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Solution

The fourth proportional to 437.25, 656.78 and 255.00 is: 383.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.25 : 656.78 = 255.00 : x
  2. Step 2: Convert to fraction form
    437.25/656.78 = 255.00/x
  3. Step 3: Cross multiply
    437.25x = 656.78 × 255.00
  4. Step 4: Simplify right side
    437.25x = 167,475.62
  5. Step 5: Solve for x
    x = 167,475.62/437.25
  6. Step 6: Final answer
    x = 383.02

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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.