Home / 2,178.46-3,005.17-1,380.48

Finding the Fourth Proportional to 2,178.46, 3,005.17 and 1,380.48

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Solution

The fourth proportional to 2,178.46, 3,005.17 and 1,380.48 is: 1,904.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.46 : 3,005.17 = 1,380.48 : x
  2. Step 2: Convert to fraction form
    2,178.46/3,005.17 = 1,380.48/x
  3. Step 3: Cross multiply
    2,178.46x = 3,005.17 × 1,380.48
  4. Step 4: Simplify right side
    2,178.46x = 4,148,577.08
  5. Step 5: Solve for x
    x = 4,148,577.08/2,178.46
  6. Step 6: Final answer
    x = 1,904.36

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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.