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Finding the Fourth Proportional to 1,191.41, 1,786.45 and 369.45

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Solution

The fourth proportional to 1,191.41, 1,786.45 and 369.45 is: 553.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.41 : 1,786.45 = 369.45 : x
  2. Step 2: Convert to fraction form
    1,191.41/1,786.45 = 369.45/x
  3. Step 3: Cross multiply
    1,191.41x = 1,786.45 × 369.45
  4. Step 4: Simplify right side
    1,191.41x = 660,003.95
  5. Step 5: Solve for x
    x = 660,003.95/1,191.41
  6. Step 6: Final answer
    x = 553.97

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1.5x scale

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.