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Finding the Fourth Proportional to 1,072.19, 1,604.16 and 994.43

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Solution

The fourth proportional to 1,072.19, 1,604.16 and 994.43 is: 1,487.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,072.19 : 1,604.16 = 994.43 : x
  2. Step 2: Convert to fraction form
    1,072.19/1,604.16 = 994.43/x
  3. Step 3: Cross multiply
    1,072.19x = 1,604.16 × 994.43
  4. Step 4: Simplify right side
    1,072.19x = 1,595,228.84
  5. Step 5: Solve for x
    x = 1,595,228.84/1,072.19
  6. Step 6: Final answer
    x = 1,487.82

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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.