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Finding the Fourth Proportional to 3,664.60, 5,490.60 and 1,712.80

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Solution

The fourth proportional to 3,664.60, 5,490.60 and 1,712.80 is: 2,566.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,664.60 : 5,490.60 = 1,712.80 : x
  2. Step 2: Convert to fraction form
    3,664.60/5,490.60 = 1,712.80/x
  3. Step 3: Cross multiply
    3,664.60x = 5,490.60 × 1,712.80
  4. Step 4: Simplify right side
    3,664.60x = 9,404,299.68
  5. Step 5: Solve for x
    x = 9,404,299.68/3,664.60
  6. Step 6: Final answer
    x = 2,566.26

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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.