Home / 3,126.35-4,687.80-1,278.77

Finding the Fourth Proportional to 3,126.35, 4,687.80 and 1,278.77

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Solution

The fourth proportional to 3,126.35, 4,687.80 and 1,278.77 is: 1,917.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.35 : 4,687.80 = 1,278.77 : x
  2. Step 2: Convert to fraction form
    3,126.35/4,687.80 = 1,278.77/x
  3. Step 3: Cross multiply
    3,126.35x = 4,687.80 × 1,278.77
  4. Step 4: Simplify right side
    3,126.35x = 5,994,592.17
  5. Step 5: Solve for x
    x = 5,994,592.17/3,126.35
  6. Step 6: Final answer
    x = 1,917.44

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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.