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Finding the Fourth Proportional to 2,981.22, 4,112.98 and 1,801.86

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Solution

The fourth proportional to 2,981.22, 4,112.98 and 1,801.86 is: 2,485.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.22 : 4,112.98 = 1,801.86 : x
  2. Step 2: Convert to fraction form
    2,981.22/4,112.98 = 1,801.86/x
  3. Step 3: Cross multiply
    2,981.22x = 4,112.98 × 1,801.86
  4. Step 4: Simplify right side
    2,981.22x = 7,411,014.14
  5. Step 5: Solve for x
    x = 7,411,014.14/2,981.22
  6. Step 6: Final answer
    x = 2,485.90

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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.