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Finding the Fourth Proportional to 886.14, 1,223.05 and 634.43

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Solution

The fourth proportional to 886.14, 1,223.05 and 634.43 is: 875.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.14 : 1,223.05 = 634.43 : x
  2. Step 2: Convert to fraction form
    886.14/1,223.05 = 634.43/x
  3. Step 3: Cross multiply
    886.14x = 1,223.05 × 634.43
  4. Step 4: Simplify right side
    886.14x = 775,942.27
  5. Step 5: Solve for x
    x = 775,942.27/886.14
  6. Step 6: Final answer
    x = 875.64

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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.