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Finding the Fourth Proportional to 1,191.56, 1,786.10 and 411.29

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Solution

The fourth proportional to 1,191.56, 1,786.10 and 411.29 is: 616.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191.56 : 1,786.10 = 411.29 : x
  2. Step 2: Convert to fraction form
    1,191.56/1,786.10 = 411.29/x
  3. Step 3: Cross multiply
    1,191.56x = 1,786.10 × 411.29
  4. Step 4: Simplify right side
    1,191.56x = 734,605.61
  5. Step 5: Solve for x
    x = 734,605.61/1,191.56
  6. Step 6: Final answer
    x = 616.51

Related Problems

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Double scale
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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.