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Finding the Fourth Proportional to 2,098.06, 3,145.91 and 864.45

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Solution

The fourth proportional to 2,098.06, 3,145.91 and 864.45 is: 1,296.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,098.06 : 3,145.91 = 864.45 : x
  2. Step 2: Convert to fraction form
    2,098.06/3,145.91 = 864.45/x
  3. Step 3: Cross multiply
    2,098.06x = 3,145.91 × 864.45
  4. Step 4: Simplify right side
    2,098.06x = 2,719,477.58
  5. Step 5: Solve for x
    x = 2,719,477.58/2,098.06
  6. Step 6: Final answer
    x = 1,296.19

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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.