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Finding the Fourth Proportional to 425.46, 637.26 and 279.05

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Solution

The fourth proportional to 425.46, 637.26 and 279.05 is: 417.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.46 : 637.26 = 279.05 : x
  2. Step 2: Convert to fraction form
    425.46/637.26 = 279.05/x
  3. Step 3: Cross multiply
    425.46x = 637.26 × 279.05
  4. Step 4: Simplify right side
    425.46x = 177,824.22
  5. Step 5: Solve for x
    x = 177,824.22/425.46
  6. Step 6: Final answer
    x = 417.96

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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.