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Finding the Fourth Proportional to 1,197.14, 1,651.86 and 755.28

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Solution

The fourth proportional to 1,197.14, 1,651.86 and 755.28 is: 1,042.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,197.14 : 1,651.86 = 755.28 : x
  2. Step 2: Convert to fraction form
    1,197.14/1,651.86 = 755.28/x
  3. Step 3: Cross multiply
    1,197.14x = 1,651.86 × 755.28
  4. Step 4: Simplify right side
    1,197.14x = 1,247,616.82
  5. Step 5: Solve for x
    x = 1,247,616.82/1,197.14
  6. Step 6: Final answer
    x = 1,042.17

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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.