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Finding the Fourth Proportional to 426.34, 635.72 and 425.56

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Solution

The fourth proportional to 426.34, 635.72 and 425.56 is: 634.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    426.34 : 635.72 = 425.56 : x
  2. Step 2: Convert to fraction form
    426.34/635.72 = 425.56/x
  3. Step 3: Cross multiply
    426.34x = 635.72 × 425.56
  4. Step 4: Simplify right side
    426.34x = 270,537.00
  5. Step 5: Solve for x
    x = 270,537.00/426.34
  6. Step 6: Final answer
    x = 634.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.