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Finding the Fourth Proportional to 3,669.52, 5,501.64 and 1,720.64

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Solution

The fourth proportional to 3,669.52, 5,501.64 and 1,720.64 is: 2,579.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,669.52 : 5,501.64 = 1,720.64 : x
  2. Step 2: Convert to fraction form
    3,669.52/5,501.64 = 1,720.64/x
  3. Step 3: Cross multiply
    3,669.52x = 5,501.64 × 1,720.64
  4. Step 4: Simplify right side
    3,669.52x = 9,466,341.85
  5. Step 5: Solve for x
    x = 9,466,341.85/3,669.52
  6. Step 6: Final answer
    x = 2,579.72

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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.