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Finding the Fourth Proportional to 1,640.90, 2,459.04 and 1,396.46

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Solution

The fourth proportional to 1,640.90, 2,459.04 and 1,396.46 is: 2,092.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.90 : 2,459.04 = 1,396.46 : x
  2. Step 2: Convert to fraction form
    1,640.90/2,459.04 = 1,396.46/x
  3. Step 3: Cross multiply
    1,640.90x = 2,459.04 × 1,396.46
  4. Step 4: Simplify right side
    1,640.90x = 3,433,951.00
  5. Step 5: Solve for x
    x = 3,433,951.00/1,640.90
  6. Step 6: Final answer
    x = 2,092.72

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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.