Home / 2,857.40-4,286.10-1,758.20

Finding the Fourth Proportional to 2,857.40, 4,286.10 and 1,758.20

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Solution

The fourth proportional to 2,857.40, 4,286.10 and 1,758.20 is: 2,637.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.40 : 4,286.10 = 1,758.20 : x
  2. Step 2: Convert to fraction form
    2,857.40/4,286.10 = 1,758.20/x
  3. Step 3: Cross multiply
    2,857.40x = 4,286.10 × 1,758.20
  4. Step 4: Simplify right side
    2,857.40x = 7,535,821.02
  5. Step 5: Solve for x
    x = 7,535,821.02/2,857.40
  6. Step 6: Final answer
    x = 2,637.30

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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.