Home / 2,911.80-4,359.12-1,922.79

Finding the Fourth Proportional to 2,911.80, 4,359.12 and 1,922.79

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Solution

The fourth proportional to 2,911.80, 4,359.12 and 1,922.79 is: 2,878.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,911.80 : 4,359.12 = 1,922.79 : x
  2. Step 2: Convert to fraction form
    2,911.80/4,359.12 = 1,922.79/x
  3. Step 3: Cross multiply
    2,911.80x = 4,359.12 × 1,922.79
  4. Step 4: Simplify right side
    2,911.80x = 8,381,672.34
  5. Step 5: Solve for x
    x = 8,381,672.34/2,911.80
  6. Step 6: Final answer
    x = 2,878.52

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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.