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Finding the Fourth Proportional to 886.72, 1,328.91 and 447.97

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Solution

The fourth proportional to 886.72, 1,328.91 and 447.97 is: 671.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.72 : 1,328.91 = 447.97 : x
  2. Step 2: Convert to fraction form
    886.72/1,328.91 = 447.97/x
  3. Step 3: Cross multiply
    886.72x = 1,328.91 × 447.97
  4. Step 4: Simplify right side
    886.72x = 595,311.81
  5. Step 5: Solve for x
    x = 595,311.81/886.72
  6. Step 6: Final answer
    x = 671.36

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.