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Finding the Fourth Proportional to 820.87, 1,232.25 and 591.10

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Solution

The fourth proportional to 820.87, 1,232.25 and 591.10 is: 887.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.87 : 1,232.25 = 591.10 : x
  2. Step 2: Convert to fraction form
    820.87/1,232.25 = 591.10/x
  3. Step 3: Cross multiply
    820.87x = 1,232.25 × 591.10
  4. Step 4: Simplify right side
    820.87x = 728,382.98
  5. Step 5: Solve for x
    x = 728,382.98/820.87
  6. Step 6: Final answer
    x = 887.33

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Why These Related Problems?

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