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Finding the Fourth Proportional to 2,857.84, 3,945.60 and 2,193.40

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Solution

The fourth proportional to 2,857.84, 3,945.60 and 2,193.40 is: 3,028.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.84 : 3,945.60 = 2,193.40 : x
  2. Step 2: Convert to fraction form
    2,857.84/3,945.60 = 2,193.40/x
  3. Step 3: Cross multiply
    2,857.84x = 3,945.60 × 2,193.40
  4. Step 4: Simplify right side
    2,857.84x = 8,654,279.04
  5. Step 5: Solve for x
    x = 8,654,279.04/2,857.84
  6. Step 6: Final answer
    x = 3,028.26

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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.