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Finding the Fourth Proportional to 883.81, 1,325.90 and 422.11

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Solution

The fourth proportional to 883.81, 1,325.90 and 422.11 is: 633.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    883.81 : 1,325.90 = 422.11 : x
  2. Step 2: Convert to fraction form
    883.81/1,325.90 = 422.11/x
  3. Step 3: Cross multiply
    883.81x = 1,325.90 × 422.11
  4. Step 4: Simplify right side
    883.81x = 559,675.65
  5. Step 5: Solve for x
    x = 559,675.65/883.81
  6. Step 6: Final answer
    x = 633.25

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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.