Home / 2,178.60-3,005.27-1,380.46

Finding the Fourth Proportional to 2,178.60, 3,005.27 and 1,380.46

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Solution

The fourth proportional to 2,178.60, 3,005.27 and 1,380.46 is: 1,904.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.60 : 3,005.27 = 1,380.46 : x
  2. Step 2: Convert to fraction form
    2,178.60/3,005.27 = 1,380.46/x
  3. Step 3: Cross multiply
    2,178.60x = 3,005.27 × 1,380.46
  4. Step 4: Simplify right side
    2,178.60x = 4,148,655.02
  5. Step 5: Solve for x
    x = 4,148,655.02/2,178.60
  6. Step 6: Final answer
    x = 1,904.28

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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.