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Finding the Fourth Proportional to 2,769.21, 4,153.83 and 689.22

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Solution

The fourth proportional to 2,769.21, 4,153.83 and 689.22 is: 1,033.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,769.21 : 4,153.83 = 689.22 : x
  2. Step 2: Convert to fraction form
    2,769.21/4,153.83 = 689.22/x
  3. Step 3: Cross multiply
    2,769.21x = 4,153.83 × 689.22
  4. Step 4: Simplify right side
    2,769.21x = 2,862,881.94
  5. Step 5: Solve for x
    x = 2,862,881.94/2,769.21
  6. Step 6: Final answer
    x = 1,033.83

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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.