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Finding the Fourth Proportional to 437.56, 656.61 and 255.31

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Solution

The fourth proportional to 437.56, 656.61 and 255.31 is: 383.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.56 : 656.61 = 255.31 : x
  2. Step 2: Convert to fraction form
    437.56/656.61 = 255.31/x
  3. Step 3: Cross multiply
    437.56x = 656.61 × 255.31
  4. Step 4: Simplify right side
    437.56x = 167,639.10
  5. Step 5: Solve for x
    x = 167,639.10/437.56
  6. Step 6: Final answer
    x = 383.12

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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.