Home / 2,772.20-4,158.30-1,128.38

Finding the Fourth Proportional to 2,772.20, 4,158.30 and 1,128.38

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Solution

The fourth proportional to 2,772.20, 4,158.30 and 1,128.38 is: 1,692.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,772.20 : 4,158.30 = 1,128.38 : x
  2. Step 2: Convert to fraction form
    2,772.20/4,158.30 = 1,128.38/x
  3. Step 3: Cross multiply
    2,772.20x = 4,158.30 × 1,128.38
  4. Step 4: Simplify right side
    2,772.20x = 4,692,136.91
  5. Step 5: Solve for x
    x = 4,692,136.91/2,772.20
  6. Step 6: Final answer
    x = 1,692.57

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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.