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Finding the Fourth Proportional to 1,263.88, 1,902.45 and 1,153.12

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Solution

The fourth proportional to 1,263.88, 1,902.45 and 1,153.12 is: 1,735.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.88 : 1,902.45 = 1,153.12 : x
  2. Step 2: Convert to fraction form
    1,263.88/1,902.45 = 1,153.12/x
  3. Step 3: Cross multiply
    1,263.88x = 1,902.45 × 1,153.12
  4. Step 4: Simplify right side
    1,263.88x = 2,193,753.14
  5. Step 5: Solve for x
    x = 2,193,753.14/1,263.88
  6. Step 6: Final answer
    x = 1,735.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.