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Finding the Fourth Proportional to 2,100.86, 3,151.20 and 540.86

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Solution

The fourth proportional to 2,100.86, 3,151.20 and 540.86 is: 811.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,100.86 : 3,151.20 = 540.86 : x
  2. Step 2: Convert to fraction form
    2,100.86/3,151.20 = 540.86/x
  3. Step 3: Cross multiply
    2,100.86x = 3,151.20 × 540.86
  4. Step 4: Simplify right side
    2,100.86x = 1,704,358.03
  5. Step 5: Solve for x
    x = 1,704,358.03/2,100.86
  6. Step 6: Final answer
    x = 811.27

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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.