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Finding the Fourth Proportional to 2,165.12, 3,249 and 866.36

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Solution

The fourth proportional to 2,165.12, 3,249 and 866.36 is: 1,300.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,165.12 : 3,249 = 866.36 : x
  2. Step 2: Convert to fraction form
    2,165.12/3,249 = 866.36/x
  3. Step 3: Cross multiply
    2,165.12x = 3,249 × 866.36
  4. Step 4: Simplify right side
    2,165.12x = 2,814,803.64
  5. Step 5: Solve for x
    x = 2,814,803.64/2,165.12
  6. Step 6: Final answer
    x = 1,300.07

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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.