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Finding the Fourth Proportional to 3,720.74, 5,582.07 and 1,641.20

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Solution

The fourth proportional to 3,720.74, 5,582.07 and 1,641.20 is: 2,462.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.74 : 5,582.07 = 1,641.20 : x
  2. Step 2: Convert to fraction form
    3,720.74/5,582.07 = 1,641.20/x
  3. Step 3: Cross multiply
    3,720.74x = 5,582.07 × 1,641.20
  4. Step 4: Simplify right side
    3,720.74x = 9,161,265.37
  5. Step 5: Solve for x
    x = 9,161,265.37/3,720.74
  6. Step 6: Final answer
    x = 2,462.22

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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.