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Finding the Fourth Proportional to 997.23, 1,375.60 and 810.93

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Solution

The fourth proportional to 997.23, 1,375.60 and 810.93 is: 1,118.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.23 : 1,375.60 = 810.93 : x
  2. Step 2: Convert to fraction form
    997.23/1,375.60 = 810.93/x
  3. Step 3: Cross multiply
    997.23x = 1,375.60 × 810.93
  4. Step 4: Simplify right side
    997.23x = 1,115,515.31
  5. Step 5: Solve for x
    x = 1,115,515.31/997.23
  6. Step 6: Final answer
    x = 1,118.61

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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.