Home / 1,224.11-1,689.20-692.85

Finding the Fourth Proportional to 1,224.11, 1,689.20 and 692.85

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Solution

The fourth proportional to 1,224.11, 1,689.20 and 692.85 is: 956.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,224.11 : 1,689.20 = 692.85 : x
  2. Step 2: Convert to fraction form
    1,224.11/1,689.20 = 692.85/x
  3. Step 3: Cross multiply
    1,224.11x = 1,689.20 × 692.85
  4. Step 4: Simplify right side
    1,224.11x = 1,170,371.59
  5. Step 5: Solve for x
    x = 1,170,371.59/1,224.11
  6. Step 6: Final answer
    x = 956.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.