Home / 1,971.19-2,720.19-1,120.60

Finding the Fourth Proportional to 1,971.19, 2,720.19 and 1,120.60

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Solution

The fourth proportional to 1,971.19, 2,720.19 and 1,120.60 is: 1,546.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.19 : 2,720.19 = 1,120.60 : x
  2. Step 2: Convert to fraction form
    1,971.19/2,720.19 = 1,120.60/x
  3. Step 3: Cross multiply
    1,971.19x = 2,720.19 × 1,120.60
  4. Step 4: Simplify right side
    1,971.19x = 3,048,244.91
  5. Step 5: Solve for x
    x = 3,048,244.91/1,971.19
  6. Step 6: Final answer
    x = 1,546.40

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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.