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Finding the Fourth Proportional to 641.97, 960.50 and 425.97

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Solution

The fourth proportional to 641.97, 960.50 and 425.97 is: 637.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.97 : 960.50 = 425.97 : x
  2. Step 2: Convert to fraction form
    641.97/960.50 = 425.97/x
  3. Step 3: Cross multiply
    641.97x = 960.50 × 425.97
  4. Step 4: Simplify right side
    641.97x = 409,142.06
  5. Step 5: Solve for x
    x = 409,142.06/641.97
  6. Step 6: Final answer
    x = 637.32

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1.5x scale

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.