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Finding the Fourth Proportional to 1,163.44, 1,604.82 and 915.58

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Solution

The fourth proportional to 1,163.44, 1,604.82 and 915.58 is: 1,262.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,163.44 : 1,604.82 = 915.58 : x
  2. Step 2: Convert to fraction form
    1,163.44/1,604.82 = 915.58/x
  3. Step 3: Cross multiply
    1,163.44x = 1,604.82 × 915.58
  4. Step 4: Simplify right side
    1,163.44x = 1,469,341.10
  5. Step 5: Solve for x
    x = 1,469,341.10/1,163.44
  6. Step 6: Final answer
    x = 1,262.93

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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.