Home / 1,553.28-2,141.12-1,378.56

Finding the Fourth Proportional to 1,553.28, 2,141.12 and 1,378.56

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Solution

The fourth proportional to 1,553.28, 2,141.12 and 1,378.56 is: 1,900.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.28 : 2,141.12 = 1,378.56 : x
  2. Step 2: Convert to fraction form
    1,553.28/2,141.12 = 1,378.56/x
  3. Step 3: Cross multiply
    1,553.28x = 2,141.12 × 1,378.56
  4. Step 4: Simplify right side
    1,553.28x = 2,951,662.39
  5. Step 5: Solve for x
    x = 2,951,662.39/1,553.28
  6. Step 6: Final answer
    x = 1,900.28

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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.