Home / 2,770.47-4,156.50-1,128.20

Finding the Fourth Proportional to 2,770.47, 4,156.50 and 1,128.20

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Solution

The fourth proportional to 2,770.47, 4,156.50 and 1,128.20 is: 1,692.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,770.47 : 4,156.50 = 1,128.20 : x
  2. Step 2: Convert to fraction form
    2,770.47/4,156.50 = 1,128.20/x
  3. Step 3: Cross multiply
    2,770.47x = 4,156.50 × 1,128.20
  4. Step 4: Simplify right side
    2,770.47x = 4,689,363.30
  5. Step 5: Solve for x
    x = 4,689,363.30/2,770.47
  6. Step 6: Final answer
    x = 1,692.62

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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.