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Finding the Fourth Proportional to 2,110.51, 3,162.51 and 811.27

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Solution

The fourth proportional to 2,110.51, 3,162.51 and 811.27 is: 1,215.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,110.51 : 3,162.51 = 811.27 : x
  2. Step 2: Convert to fraction form
    2,110.51/3,162.51 = 811.27/x
  3. Step 3: Cross multiply
    2,110.51x = 3,162.51 × 811.27
  4. Step 4: Simplify right side
    2,110.51x = 2,565,649.49
  5. Step 5: Solve for x
    x = 2,565,649.49/2,110.51
  6. Step 6: Final answer
    x = 1,215.65

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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.