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Finding the Fourth Proportional to 1,355.12, 2,028 and 834.92

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Solution

The fourth proportional to 1,355.12, 2,028 and 834.92 is: 1,249.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.12 : 2,028 = 834.92 : x
  2. Step 2: Convert to fraction form
    1,355.12/2,028 = 834.92/x
  3. Step 3: Cross multiply
    1,355.12x = 2,028 × 834.92
  4. Step 4: Simplify right side
    1,355.12x = 1,693,217.76
  5. Step 5: Solve for x
    x = 1,693,217.76/1,355.12
  6. Step 6: Final answer
    x = 1,249.50

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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.