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Finding the Fourth Proportional to 996.66, 1,375.01 and 623.49

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Solution

The fourth proportional to 996.66, 1,375.01 and 623.49 is: 860.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    996.66 : 1,375.01 = 623.49 : x
  2. Step 2: Convert to fraction form
    996.66/1,375.01 = 623.49/x
  3. Step 3: Cross multiply
    996.66x = 1,375.01 × 623.49
  4. Step 4: Simplify right side
    996.66x = 857,309.98
  5. Step 5: Solve for x
    x = 857,309.98/996.66
  6. Step 6: Final answer
    x = 860.19

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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.