Home / 2,772.97-4,158.30-1,128.40

Finding the Fourth Proportional to 2,772.97, 4,158.30 and 1,128.40

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Solution

The fourth proportional to 2,772.97, 4,158.30 and 1,128.40 is: 1,692.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,772.97 : 4,158.30 = 1,128.40 : x
  2. Step 2: Convert to fraction form
    2,772.97/4,158.30 = 1,128.40/x
  3. Step 3: Cross multiply
    2,772.97x = 4,158.30 × 1,128.40
  4. Step 4: Simplify right side
    2,772.97x = 4,692,211.09
  5. Step 5: Solve for x
    x = 4,692,211.09/2,772.97
  6. Step 6: Final answer
    x = 1,692.13

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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.