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Finding the Fourth Proportional to 2,110.48, 3,165.72 and 812.08

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Solution

The fourth proportional to 2,110.48, 3,165.72 and 812.08 is: 1,218.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,110.48 : 3,165.72 = 812.08 : x
  2. Step 2: Convert to fraction form
    2,110.48/3,165.72 = 812.08/x
  3. Step 3: Cross multiply
    2,110.48x = 3,165.72 × 812.08
  4. Step 4: Simplify right side
    2,110.48x = 2,570,817.90
  5. Step 5: Solve for x
    x = 2,570,817.90/2,110.48
  6. Step 6: Final answer
    x = 1,218.12

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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.