Home / 4,982.40-6,875.38-2,857.90

Finding the Fourth Proportional to 4,982.40, 6,875.38 and 2,857.90

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Solution

The fourth proportional to 4,982.40, 6,875.38 and 2,857.90 is: 3,943.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,982.40 : 6,875.38 = 2,857.90 : x
  2. Step 2: Convert to fraction form
    4,982.40/6,875.38 = 2,857.90/x
  3. Step 3: Cross multiply
    4,982.40x = 6,875.38 × 2,857.90
  4. Step 4: Simplify right side
    4,982.40x = 19,649,148.50
  5. Step 5: Solve for x
    x = 19,649,148.50/4,982.40
  6. Step 6: Final answer
    x = 3,943.71

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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.