Home / 1,191.13-1,787.58-451.42

Finding the Fourth Proportional to 1,191.13, 1,787.58 and 451.42

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Solution

The fourth proportional to 1,191.13, 1,787.58 and 451.42 is: 677.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.13 : 1,787.58 = 451.42 : x
  2. Step 2: Convert to fraction form
    1,191.13/1,787.58 = 451.42/x
  3. Step 3: Cross multiply
    1,191.13x = 1,787.58 × 451.42
  4. Step 4: Simplify right side
    1,191.13x = 806,949.36
  5. Step 5: Solve for x
    x = 806,949.36/1,191.13
  6. Step 6: Final answer
    x = 677.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.