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Finding the Fourth Proportional to 1,195.11, 1,790.78 and 578.43

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Solution

The fourth proportional to 1,195.11, 1,790.78 and 578.43 is: 866.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.11 : 1,790.78 = 578.43 : x
  2. Step 2: Convert to fraction form
    1,195.11/1,790.78 = 578.43/x
  3. Step 3: Cross multiply
    1,195.11x = 1,790.78 × 578.43
  4. Step 4: Simplify right side
    1,195.11x = 1,035,837.98
  5. Step 5: Solve for x
    x = 1,035,837.98/1,195.11
  6. Step 6: Final answer
    x = 866.73

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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.