Home / 3,390.80-4,679.30-1,898.72

Finding the Fourth Proportional to 3,390.80, 4,679.30 and 1,898.72

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Solution

The fourth proportional to 3,390.80, 4,679.30 and 1,898.72 is: 2,620.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,390.80 : 4,679.30 = 1,898.72 : x
  2. Step 2: Convert to fraction form
    3,390.80/4,679.30 = 1,898.72/x
  3. Step 3: Cross multiply
    3,390.80x = 4,679.30 × 1,898.72
  4. Step 4: Simplify right side
    3,390.80x = 8,884,680.50
  5. Step 5: Solve for x
    x = 8,884,680.50/3,390.80
  6. Step 6: Final answer
    x = 2,620.23

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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.