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Finding the Fourth Proportional to 886.40, 1,218.10 and 845.75

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Solution

The fourth proportional to 886.40, 1,218.10 and 845.75 is: 1,162.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    886.40 : 1,218.10 = 845.75 : x
  2. Step 2: Convert to fraction form
    886.40/1,218.10 = 845.75/x
  3. Step 3: Cross multiply
    886.40x = 1,218.10 × 845.75
  4. Step 4: Simplify right side
    886.40x = 1,030,204.44
  5. Step 5: Solve for x
    x = 1,030,204.44/886.40
  6. Step 6: Final answer
    x = 1,162.23

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.