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Finding the Fourth Proportional to 886.44, 1,329.82 and 399.23

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Solution

The fourth proportional to 886.44, 1,329.82 and 399.23 is: 598.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.44 : 1,329.82 = 399.23 : x
  2. Step 2: Convert to fraction form
    886.44/1,329.82 = 399.23/x
  3. Step 3: Cross multiply
    886.44x = 1,329.82 × 399.23
  4. Step 4: Simplify right side
    886.44x = 530,901.38
  5. Step 5: Solve for x
    x = 530,901.38/886.44
  6. Step 6: Final answer
    x = 598.91

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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.