Home / 3,540.90-5,308.95-1,981.98

Finding the Fourth Proportional to 3,540.90, 5,308.95 and 1,981.98

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Solution

The fourth proportional to 3,540.90, 5,308.95 and 1,981.98 is: 2,971.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540.90 : 5,308.95 = 1,981.98 : x
  2. Step 2: Convert to fraction form
    3,540.90/5,308.95 = 1,981.98/x
  3. Step 3: Cross multiply
    3,540.90x = 5,308.95 × 1,981.98
  4. Step 4: Simplify right side
    3,540.90x = 10,522,219.65
  5. Step 5: Solve for x
    x = 10,522,219.65/3,540.90
  6. Step 6: Final answer
    x = 2,971.62

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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.