Home / 2,178.12-3,267.41-618.20

Finding the Fourth Proportional to 2,178.12, 3,267.41 and 618.20

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Solution

The fourth proportional to 2,178.12, 3,267.41 and 618.20 is: 927.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.12 : 3,267.41 = 618.20 : x
  2. Step 2: Convert to fraction form
    2,178.12/3,267.41 = 618.20/x
  3. Step 3: Cross multiply
    2,178.12x = 3,267.41 × 618.20
  4. Step 4: Simplify right side
    2,178.12x = 2,019,905.69
  5. Step 5: Solve for x
    x = 2,019,905.69/2,178.12
  6. Step 6: Final answer
    x = 927.36

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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.