Home / 2,143.11-3,214.66-756.55

Finding the Fourth Proportional to 2,143.11, 3,214.66 and 756.55

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Solution

The fourth proportional to 2,143.11, 3,214.66 and 756.55 is: 1,134.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.11 : 3,214.66 = 756.55 : x
  2. Step 2: Convert to fraction form
    2,143.11/3,214.66 = 756.55/x
  3. Step 3: Cross multiply
    2,143.11x = 3,214.66 × 756.55
  4. Step 4: Simplify right side
    2,143.11x = 2,432,051.02
  5. Step 5: Solve for x
    x = 2,432,051.02/2,143.11
  6. Step 6: Final answer
    x = 1,134.82

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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.