Home / 3,415.64-5,115.06-2,179.40

Finding the Fourth Proportional to 3,415.64, 5,115.06 and 2,179.40

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Solution

The fourth proportional to 3,415.64, 5,115.06 and 2,179.40 is: 3,263.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,415.64 : 5,115.06 = 2,179.40 : x
  2. Step 2: Convert to fraction form
    3,415.64/5,115.06 = 2,179.40/x
  3. Step 3: Cross multiply
    3,415.64x = 5,115.06 × 2,179.40
  4. Step 4: Simplify right side
    3,415.64x = 11,147,761.76
  5. Step 5: Solve for x
    x = 11,147,761.76/3,415.64
  6. Step 6: Final answer
    x = 3,263.74

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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.