Home / 3,720.12-5,581.63-1,638.66

Finding the Fourth Proportional to 3,720.12, 5,581.63 and 1,638.66

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Solution

The fourth proportional to 3,720.12, 5,581.63 and 1,638.66 is: 2,458.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,720.12 : 5,581.63 = 1,638.66 : x
  2. Step 2: Convert to fraction form
    3,720.12/5,581.63 = 1,638.66/x
  3. Step 3: Cross multiply
    3,720.12x = 5,581.63 × 1,638.66
  4. Step 4: Simplify right side
    3,720.12x = 9,146,357.71
  5. Step 5: Solve for x
    x = 9,146,357.71/3,720.12
  6. Step 6: Final answer
    x = 2,458.62

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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.