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Finding the Fourth Proportional to 1,232.15, 1,848.89 and 866.21

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Solution

The fourth proportional to 1,232.15, 1,848.89 and 866.21 is: 1,299.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,232.15 : 1,848.89 = 866.21 : x
  2. Step 2: Convert to fraction form
    1,232.15/1,848.89 = 866.21/x
  3. Step 3: Cross multiply
    1,232.15x = 1,848.89 × 866.21
  4. Step 4: Simplify right side
    1,232.15x = 1,601,519.93
  5. Step 5: Solve for x
    x = 1,601,519.93/1,232.15
  6. Step 6: Final answer
    x = 1,299.78

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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.