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Finding the Fourth Proportional to 3,636.91, 5,455.87 and 1,788.10

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Solution

The fourth proportional to 3,636.91, 5,455.87 and 1,788.10 is: 2,682.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,636.91 : 5,455.87 = 1,788.10 : x
  2. Step 2: Convert to fraction form
    3,636.91/5,455.87 = 1,788.10/x
  3. Step 3: Cross multiply
    3,636.91x = 5,455.87 × 1,788.10
  4. Step 4: Simplify right side
    3,636.91x = 9,755,641.15
  5. Step 5: Solve for x
    x = 9,755,641.15/3,636.91
  6. Step 6: Final answer
    x = 2,682.40

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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.