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Finding the Fourth Proportional to 1,428.80, 2,141.98 and 562.55

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Solution

The fourth proportional to 1,428.80, 2,141.98 and 562.55 is: 843.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.80 : 2,141.98 = 562.55 : x
  2. Step 2: Convert to fraction form
    1,428.80/2,141.98 = 562.55/x
  3. Step 3: Cross multiply
    1,428.80x = 2,141.98 × 562.55
  4. Step 4: Simplify right side
    1,428.80x = 1,204,958.73
  5. Step 5: Solve for x
    x = 1,204,958.73/1,428.80
  6. Step 6: Final answer
    x = 843.34

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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.