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Finding the Fourth Proportional to 1,191.10, 1,786.69 and 325.41

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Solution

The fourth proportional to 1,191.10, 1,786.69 and 325.41 is: 488.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.10 : 1,786.69 = 325.41 : x
  2. Step 2: Convert to fraction form
    1,191.10/1,786.69 = 325.41/x
  3. Step 3: Cross multiply
    1,191.10x = 1,786.69 × 325.41
  4. Step 4: Simplify right side
    1,191.10x = 581,406.79
  5. Step 5: Solve for x
    x = 581,406.79/1,191.10
  6. Step 6: Final answer
    x = 488.13

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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.