Home / 3,320.45-4,580.70-1,991.87

Finding the Fourth Proportional to 3,320.45, 4,580.70 and 1,991.87

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Solution

The fourth proportional to 3,320.45, 4,580.70 and 1,991.87 is: 2,747.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.45 : 4,580.70 = 1,991.87 : x
  2. Step 2: Convert to fraction form
    3,320.45/4,580.70 = 1,991.87/x
  3. Step 3: Cross multiply
    3,320.45x = 4,580.70 × 1,991.87
  4. Step 4: Simplify right side
    3,320.45x = 9,124,158.91
  5. Step 5: Solve for x
    x = 9,124,158.91/3,320.45
  6. Step 6: Final answer
    x = 2,747.87

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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.