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Finding the Fourth Proportional to 1,359.09, 1,884.09 and 1,285.17

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Solution

The fourth proportional to 1,359.09, 1,884.09 and 1,285.17 is: 1,781.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.09 : 1,884.09 = 1,285.17 : x
  2. Step 2: Convert to fraction form
    1,359.09/1,884.09 = 1,285.17/x
  3. Step 3: Cross multiply
    1,359.09x = 1,884.09 × 1,285.17
  4. Step 4: Simplify right side
    1,359.09x = 2,421,375.95
  5. Step 5: Solve for x
    x = 2,421,375.95/1,359.09
  6. Step 6: Final answer
    x = 1,781.62

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.