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Finding the Fourth Proportional to 1,186.44, 1,634.95 and 906.99

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Solution

The fourth proportional to 1,186.44, 1,634.95 and 906.99 is: 1,249.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.44 : 1,634.95 = 906.99 : x
  2. Step 2: Convert to fraction form
    1,186.44/1,634.95 = 906.99/x
  3. Step 3: Cross multiply
    1,186.44x = 1,634.95 × 906.99
  4. Step 4: Simplify right side
    1,186.44x = 1,482,870.59
  5. Step 5: Solve for x
    x = 1,482,870.59/1,186.44
  6. Step 6: Final answer
    x = 1,249.85

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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.