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Finding the Fourth Proportional to 2,130.97, 3,194.88 and 669.28

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Solution

The fourth proportional to 2,130.97, 3,194.88 and 669.28 is: 1,003.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,130.97 : 3,194.88 = 669.28 : x
  2. Step 2: Convert to fraction form
    2,130.97/3,194.88 = 669.28/x
  3. Step 3: Cross multiply
    2,130.97x = 3,194.88 × 669.28
  4. Step 4: Simplify right side
    2,130.97x = 2,138,269.29
  5. Step 5: Solve for x
    x = 2,138,269.29/2,130.97
  6. Step 6: Final answer
    x = 1,003.43

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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.