Home / 2,216.21-3,317.87-1,288.94

Finding the Fourth Proportional to 2,216.21, 3,317.87 and 1,288.94

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Solution

The fourth proportional to 2,216.21, 3,317.87 and 1,288.94 is: 1,929.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216.21 : 3,317.87 = 1,288.94 : x
  2. Step 2: Convert to fraction form
    2,216.21/3,317.87 = 1,288.94/x
  3. Step 3: Cross multiply
    2,216.21x = 3,317.87 × 1,288.94
  4. Step 4: Simplify right side
    2,216.21x = 4,276,521.99
  5. Step 5: Solve for x
    x = 4,276,521.99/2,216.21
  6. Step 6: Final answer
    x = 1,929.66

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1.5x scale

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.