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Finding the Fourth Proportional to 2,640.79, 3,646.99 and 2,194.28

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Solution

The fourth proportional to 2,640.79, 3,646.99 and 2,194.28 is: 3,030.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.79 : 3,646.99 = 2,194.28 : x
  2. Step 2: Convert to fraction form
    2,640.79/3,646.99 = 2,194.28/x
  3. Step 3: Cross multiply
    2,640.79x = 3,646.99 × 2,194.28
  4. Step 4: Simplify right side
    2,640.79x = 8,002,517.22
  5. Step 5: Solve for x
    x = 8,002,517.22/2,640.79
  6. Step 6: Final answer
    x = 3,030.35

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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.