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Finding the Fourth Proportional to 1,353.78, 2,028.22 and 1,259

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Solution

The fourth proportional to 1,353.78, 2,028.22 and 1,259 is: 1,886.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,353.78 : 2,028.22 = 1,259 : x
  2. Step 2: Convert to fraction form
    1,353.78/2,028.22 = 1,259/x
  3. Step 3: Cross multiply
    1,353.78x = 2,028.22 × 1,259
  4. Step 4: Simplify right side
    1,353.78x = 2,553,528.98
  5. Step 5: Solve for x
    x = 2,553,528.98/1,353.78
  6. Step 6: Final answer
    x = 1,886.22

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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.