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Finding the Fourth Proportional to 1,194.18, 1,648.89 and 774.84

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Solution

The fourth proportional to 1,194.18, 1,648.89 and 774.84 is: 1,069.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,194.18 : 1,648.89 = 774.84 : x
  2. Step 2: Convert to fraction form
    1,194.18/1,648.89 = 774.84/x
  3. Step 3: Cross multiply
    1,194.18x = 1,648.89 × 774.84
  4. Step 4: Simplify right side
    1,194.18x = 1,277,625.93
  5. Step 5: Solve for x
    x = 1,277,625.93/1,194.18
  6. Step 6: Final answer
    x = 1,069.88

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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.