Home / 2,857.23-3,943.89-1,678.68

Finding the Fourth Proportional to 2,857.23, 3,943.89 and 1,678.68

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Solution

The fourth proportional to 2,857.23, 3,943.89 and 1,678.68 is: 2,317.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.23 : 3,943.89 = 1,678.68 : x
  2. Step 2: Convert to fraction form
    2,857.23/3,943.89 = 1,678.68/x
  3. Step 3: Cross multiply
    2,857.23x = 3,943.89 × 1,678.68
  4. Step 4: Simplify right side
    2,857.23x = 6,620,529.27
  5. Step 5: Solve for x
    x = 6,620,529.27/2,857.23
  6. Step 6: Final answer
    x = 2,317.11

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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.