Home / 2,218.31-3,328.28-757.61

Finding the Fourth Proportional to 2,218.31, 3,328.28 and 757.61

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Solution

The fourth proportional to 2,218.31, 3,328.28 and 757.61 is: 1,136.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,218.31 : 3,328.28 = 757.61 : x
  2. Step 2: Convert to fraction form
    2,218.31/3,328.28 = 757.61/x
  3. Step 3: Cross multiply
    2,218.31x = 3,328.28 × 757.61
  4. Step 4: Simplify right side
    2,218.31x = 2,521,538.21
  5. Step 5: Solve for x
    x = 2,521,538.21/2,218.31
  6. Step 6: Final answer
    x = 1,136.69

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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.