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Finding the Fourth Proportional to 490.62, 734.50 and 425.55

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Solution

The fourth proportional to 490.62, 734.50 and 425.55 is: 637.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    490.62 : 734.50 = 425.55 : x
  2. Step 2: Convert to fraction form
    490.62/734.50 = 425.55/x
  3. Step 3: Cross multiply
    490.62x = 734.50 × 425.55
  4. Step 4: Simplify right side
    490.62x = 312,566.48
  5. Step 5: Solve for x
    x = 312,566.48/490.62
  6. Step 6: Final answer
    x = 637.08

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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.