Home / 3,129.18-4,692.69-1,179.78

Finding the Fourth Proportional to 3,129.18, 4,692.69 and 1,179.78

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Solution

The fourth proportional to 3,129.18, 4,692.69 and 1,179.78 is: 1,769.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.18 : 4,692.69 = 1,179.78 : x
  2. Step 2: Convert to fraction form
    3,129.18/4,692.69 = 1,179.78/x
  3. Step 3: Cross multiply
    3,129.18x = 4,692.69 × 1,179.78
  4. Step 4: Simplify right side
    3,129.18x = 5,536,341.81
  5. Step 5: Solve for x
    x = 5,536,341.81/3,129.18
  6. Step 6: Final answer
    x = 1,769.26

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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.