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Finding the Fourth Proportional to 1,163.04, 1,604.63 and 721.10

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Solution

The fourth proportional to 1,163.04, 1,604.63 and 721.10 is: 994.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.04 : 1,604.63 = 721.10 : x
  2. Step 2: Convert to fraction form
    1,163.04/1,604.63 = 721.10/x
  3. Step 3: Cross multiply
    1,163.04x = 1,604.63 × 721.10
  4. Step 4: Simplify right side
    1,163.04x = 1,157,087.06
  5. Step 5: Solve for x
    x = 1,157,087.06/1,163.04
  6. Step 6: Final answer
    x = 994.88

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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.