Home / 2,540.19-3,505.65-1,421.24

Finding the Fourth Proportional to 2,540.19, 3,505.65 and 1,421.24

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Solution

The fourth proportional to 2,540.19, 3,505.65 and 1,421.24 is: 1,961.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,540.19 : 3,505.65 = 1,421.24 : x
  2. Step 2: Convert to fraction form
    2,540.19/3,505.65 = 1,421.24/x
  3. Step 3: Cross multiply
    2,540.19x = 3,505.65 × 1,421.24
  4. Step 4: Simplify right side
    2,540.19x = 4,982,370.01
  5. Step 5: Solve for x
    x = 4,982,370.01/2,540.19
  6. Step 6: Final answer
    x = 1,961.42

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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.