Home / 2,572.21-3,858.27-840.84

Finding the Fourth Proportional to 2,572.21, 3,858.27 and 840.84

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Solution

The fourth proportional to 2,572.21, 3,858.27 and 840.84 is: 1,261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,572.21 : 3,858.27 = 840.84 : x
  2. Step 2: Convert to fraction form
    2,572.21/3,858.27 = 840.84/x
  3. Step 3: Cross multiply
    2,572.21x = 3,858.27 × 840.84
  4. Step 4: Simplify right side
    2,572.21x = 3,244,187.75
  5. Step 5: Solve for x
    x = 3,244,187.75/2,572.21
  6. Step 6: Final answer
    x = 1,261.25

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