Home / 2,151.65-3,226.40-690.61

Finding the Fourth Proportional to 2,151.65, 3,226.40 and 690.61

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Solution

The fourth proportional to 2,151.65, 3,226.40 and 690.61 is: 1,035.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.65 : 3,226.40 = 690.61 : x
  2. Step 2: Convert to fraction form
    2,151.65/3,226.40 = 690.61/x
  3. Step 3: Cross multiply
    2,151.65x = 3,226.40 × 690.61
  4. Step 4: Simplify right side
    2,151.65x = 2,228,184.10
  5. Step 5: Solve for x
    x = 2,228,184.10/2,151.65
  6. Step 6: Final answer
    x = 1,035.57

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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.