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Finding the Fourth Proportional to 425.63, 638.46 and 252.50

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Solution

The fourth proportional to 425.63, 638.46 and 252.50 is: 378.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.63 : 638.46 = 252.50 : x
  2. Step 2: Convert to fraction form
    425.63/638.46 = 252.50/x
  3. Step 3: Cross multiply
    425.63x = 638.46 × 252.50
  4. Step 4: Simplify right side
    425.63x = 161,207.96
  5. Step 5: Solve for x
    x = 161,207.96/425.63
  6. Step 6: Final answer
    x = 378.75

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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.