Home / 2,856.96-3,943.08-1,678.74

Finding the Fourth Proportional to 2,856.96, 3,943.08 and 1,678.74

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Solution

The fourth proportional to 2,856.96, 3,943.08 and 1,678.74 is: 2,316.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,856.96 : 3,943.08 = 1,678.74 : x
  2. Step 2: Convert to fraction form
    2,856.96/3,943.08 = 1,678.74/x
  3. Step 3: Cross multiply
    2,856.96x = 3,943.08 × 1,678.74
  4. Step 4: Simplify right side
    2,856.96x = 6,619,406.12
  5. Step 5: Solve for x
    x = 6,619,406.12/2,856.96
  6. Step 6: Final answer
    x = 2,316.94

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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.