Home / 1,553.71-2,331.57-1,428.56

Finding the Fourth Proportional to 1,553.71, 2,331.57 and 1,428.56

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Solution

The fourth proportional to 1,553.71, 2,331.57 and 1,428.56 is: 2,143.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.71 : 2,331.57 = 1,428.56 : x
  2. Step 2: Convert to fraction form
    1,553.71/2,331.57 = 1,428.56/x
  3. Step 3: Cross multiply
    1,553.71x = 2,331.57 × 1,428.56
  4. Step 4: Simplify right side
    1,553.71x = 3,330,787.64
  5. Step 5: Solve for x
    x = 3,330,787.64/1,553.71
  6. Step 6: Final answer
    x = 2,143.76

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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.