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Finding the Fourth Proportional to 2,640.94, 3,979.02 and 2,391.08

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Solution

The fourth proportional to 2,640.94, 3,979.02 and 2,391.08 is: 3,602.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.94 : 3,979.02 = 2,391.08 : x
  2. Step 2: Convert to fraction form
    2,640.94/3,979.02 = 2,391.08/x
  3. Step 3: Cross multiply
    2,640.94x = 3,979.02 × 2,391.08
  4. Step 4: Simplify right side
    2,640.94x = 9,514,155.14
  5. Step 5: Solve for x
    x = 9,514,155.14/2,640.94
  6. Step 6: Final answer
    x = 3,602.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.