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Finding the Fourth Proportional to 426.32, 639.83 and 170.00

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Solution

The fourth proportional to 426.32, 639.83 and 170.00 is: 255.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.32 : 639.83 = 170.00 : x
  2. Step 2: Convert to fraction form
    426.32/639.83 = 170.00/x
  3. Step 3: Cross multiply
    426.32x = 639.83 × 170.00
  4. Step 4: Simplify right side
    426.32x = 108,768.33
  5. Step 5: Solve for x
    x = 108,768.33/426.32
  6. Step 6: Final answer
    x = 255.14

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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.