Home / 2,258.19-3,115.71-1,408.12

Finding the Fourth Proportional to 2,258.19, 3,115.71 and 1,408.12

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Solution

The fourth proportional to 2,258.19, 3,115.71 and 1,408.12 is: 1,942.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,258.19 : 3,115.71 = 1,408.12 : x
  2. Step 2: Convert to fraction form
    2,258.19/3,115.71 = 1,408.12/x
  3. Step 3: Cross multiply
    2,258.19x = 3,115.71 × 1,408.12
  4. Step 4: Simplify right side
    2,258.19x = 4,387,285.78
  5. Step 5: Solve for x
    x = 4,387,285.78/2,258.19
  6. Step 6: Final answer
    x = 1,942.83

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Half scale
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Double scale
Find fourth proportional to 2,259.19, 3,117.09 and 1,409.12
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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.