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Finding the Fourth Proportional to 896.90, 1,231.89 and 875.30

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Solution

The fourth proportional to 896.90, 1,231.89 and 875.30 is: 1,202.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.90 : 1,231.89 = 875.30 : x
  2. Step 2: Convert to fraction form
    896.90/1,231.89 = 875.30/x
  3. Step 3: Cross multiply
    896.90x = 1,231.89 × 875.30
  4. Step 4: Simplify right side
    896.90x = 1,078,268.94
  5. Step 5: Solve for x
    x = 1,078,268.94/896.90
  6. Step 6: Final answer
    x = 1,202.22

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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.