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Finding the Fourth Proportional to 891.05, 1,330.48 and 797.90

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Solution

The fourth proportional to 891.05, 1,330.48 and 797.90 is: 1,191.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.05 : 1,330.48 = 797.90 : x
  2. Step 2: Convert to fraction form
    891.05/1,330.48 = 797.90/x
  3. Step 3: Cross multiply
    891.05x = 1,330.48 × 797.90
  4. Step 4: Simplify right side
    891.05x = 1,061,584.34
  5. Step 5: Solve for x
    x = 1,061,584.34/891.05
  6. Step 6: Final answer
    x = 1,191.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.