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Finding the Fourth Proportional to 885.04, 1,326.08 and 422.72

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Solution

The fourth proportional to 885.04, 1,326.08 and 422.72 is: 633.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    885.04 : 1,326.08 = 422.72 : x
  2. Step 2: Convert to fraction form
    885.04/1,326.08 = 422.72/x
  3. Step 3: Cross multiply
    885.04x = 1,326.08 × 422.72
  4. Step 4: Simplify right side
    885.04x = 560,560.54
  5. Step 5: Solve for x
    x = 560,560.54/885.04
  6. Step 6: Final answer
    x = 633.37

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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.