Home / 2,122.26-2,928.72-1,190.76

Finding the Fourth Proportional to 2,122.26, 2,928.72 and 1,190.76

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Solution

The fourth proportional to 2,122.26, 2,928.72 and 1,190.76 is: 1,643.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.26 : 2,928.72 = 1,190.76 : x
  2. Step 2: Convert to fraction form
    2,122.26/2,928.72 = 1,190.76/x
  3. Step 3: Cross multiply
    2,122.26x = 2,928.72 × 1,190.76
  4. Step 4: Simplify right side
    2,122.26x = 3,487,402.63
  5. Step 5: Solve for x
    x = 3,487,402.63/2,122.26
  6. Step 6: Final answer
    x = 1,643.25

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.