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Finding the Fourth Proportional to 641.66, 884.78 and 464.27

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Solution

The fourth proportional to 641.66, 884.78 and 464.27 is: 640.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.66 : 884.78 = 464.27 : x
  2. Step 2: Convert to fraction form
    641.66/884.78 = 464.27/x
  3. Step 3: Cross multiply
    641.66x = 884.78 × 464.27
  4. Step 4: Simplify right side
    641.66x = 410,780.18
  5. Step 5: Solve for x
    x = 410,780.18/641.66
  6. Step 6: Final answer
    x = 640.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.