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Finding the Fourth Proportional to 3,564.88, 4,921.17 and 2,620.68

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Solution

The fourth proportional to 3,564.88, 4,921.17 and 2,620.68 is: 3,617.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,564.88 : 4,921.17 = 2,620.68 : x
  2. Step 2: Convert to fraction form
    3,564.88/4,921.17 = 2,620.68/x
  3. Step 3: Cross multiply
    3,564.88x = 4,921.17 × 2,620.68
  4. Step 4: Simplify right side
    3,564.88x = 12,896,811.80
  5. Step 5: Solve for x
    x = 12,896,811.80/3,564.88
  6. Step 6: Final answer
    x = 3,617.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.