Home / 2,179.35-3,006.45-1,392.84

Finding the Fourth Proportional to 2,179.35, 3,006.45 and 1,392.84

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Solution

The fourth proportional to 2,179.35, 3,006.45 and 1,392.84 is: 1,921.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,179.35 : 3,006.45 = 1,392.84 : x
  2. Step 2: Convert to fraction form
    2,179.35/3,006.45 = 1,392.84/x
  3. Step 3: Cross multiply
    2,179.35x = 3,006.45 × 1,392.84
  4. Step 4: Simplify right side
    2,179.35x = 4,187,503.82
  5. Step 5: Solve for x
    x = 4,187,503.82/2,179.35
  6. Step 6: Final answer
    x = 1,921.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.