Home / 1,945.71-2,685.13-1,189.62

Finding the Fourth Proportional to 1,945.71, 2,685.13 and 1,189.62

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Solution

The fourth proportional to 1,945.71, 2,685.13 and 1,189.62 is: 1,641.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,945.71 : 2,685.13 = 1,189.62 : x
  2. Step 2: Convert to fraction form
    1,945.71/2,685.13 = 1,189.62/x
  3. Step 3: Cross multiply
    1,945.71x = 2,685.13 × 1,189.62
  4. Step 4: Simplify right side
    1,945.71x = 3,194,281.38
  5. Step 5: Solve for x
    x = 3,194,281.38/1,945.71
  6. Step 6: Final answer
    x = 1,641.70

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.