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Finding the Fourth Proportional to 1,182.11, 1,779.10 and 891.11

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Solution

The fourth proportional to 1,182.11, 1,779.10 and 891.11 is: 1,341.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.11 : 1,779.10 = 891.11 : x
  2. Step 2: Convert to fraction form
    1,182.11/1,779.10 = 891.11/x
  3. Step 3: Cross multiply
    1,182.11x = 1,779.10 × 891.11
  4. Step 4: Simplify right side
    1,182.11x = 1,585,376.02
  5. Step 5: Solve for x
    x = 1,585,376.02/1,182.11
  6. Step 6: Final answer
    x = 1,341.15

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.