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Finding the Fourth Proportional to 2,084.64, 3,126.60 and 697.83

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Solution

The fourth proportional to 2,084.64, 3,126.60 and 697.83 is: 1,046.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,084.64 : 3,126.60 = 697.83 : x
  2. Step 2: Convert to fraction form
    2,084.64/3,126.60 = 697.83/x
  3. Step 3: Cross multiply
    2,084.64x = 3,126.60 × 697.83
  4. Step 4: Simplify right side
    2,084.64x = 2,181,835.28
  5. Step 5: Solve for x
    x = 2,181,835.28/2,084.64
  6. Step 6: Final answer
    x = 1,046.62

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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.