Home / 2,857.28-3,943.08-1,678.37

Finding the Fourth Proportional to 2,857.28, 3,943.08 and 1,678.37

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Solution

The fourth proportional to 2,857.28, 3,943.08 and 1,678.37 is: 2,316.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,857.28 : 3,943.08 = 1,678.37 : x
  2. Step 2: Convert to fraction form
    2,857.28/3,943.08 = 1,678.37/x
  3. Step 3: Cross multiply
    2,857.28x = 3,943.08 × 1,678.37
  4. Step 4: Simplify right side
    2,857.28x = 6,617,957.04
  5. Step 5: Solve for x
    x = 6,617,957.04/2,857.28
  6. Step 6: Final answer
    x = 2,316.17

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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.