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Finding the Fourth Proportional to 3,539.78, 5,310.75 and 1,809.62

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Solution

The fourth proportional to 3,539.78, 5,310.75 and 1,809.62 is: 2,714.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,539.78 : 5,310.75 = 1,809.62 : x
  2. Step 2: Convert to fraction form
    3,539.78/5,310.75 = 1,809.62/x
  3. Step 3: Cross multiply
    3,539.78x = 5,310.75 × 1,809.62
  4. Step 4: Simplify right side
    3,539.78x = 9,610,439.42
  5. Step 5: Solve for x
    x = 9,610,439.42/3,539.78
  6. Step 6: Final answer
    x = 2,714.98

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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.