Home / 3,127.80-4,692.40-1,278.66

Finding the Fourth Proportional to 3,127.80, 4,692.40 and 1,278.66

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Solution

The fourth proportional to 3,127.80, 4,692.40 and 1,278.66 is: 1,918.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.80 : 4,692.40 = 1,278.66 : x
  2. Step 2: Convert to fraction form
    3,127.80/4,692.40 = 1,278.66/x
  3. Step 3: Cross multiply
    3,127.80x = 4,692.40 × 1,278.66
  4. Step 4: Simplify right side
    3,127.80x = 5,999,984.18
  5. Step 5: Solve for x
    x = 5,999,984.18/3,127.80
  6. Step 6: Final answer
    x = 1,918.28

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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.