Home / 2,217.77-3,320.21-1,290.50

Finding the Fourth Proportional to 2,217.77, 3,320.21 and 1,290.50

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Solution

The fourth proportional to 2,217.77, 3,320.21 and 1,290.50 is: 1,932.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.77 : 3,320.21 = 1,290.50 : x
  2. Step 2: Convert to fraction form
    2,217.77/3,320.21 = 1,290.50/x
  3. Step 3: Cross multiply
    2,217.77x = 3,320.21 × 1,290.50
  4. Step 4: Simplify right side
    2,217.77x = 4,284,731.01
  5. Step 5: Solve for x
    x = 4,284,731.01/2,217.77
  6. Step 6: Final answer
    x = 1,932.00

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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.