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Finding the Fourth Proportional to 879.18, 1,318.99 and 294.24

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Solution

The fourth proportional to 879.18, 1,318.99 and 294.24 is: 441.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.18 : 1,318.99 = 294.24 : x
  2. Step 2: Convert to fraction form
    879.18/1,318.99 = 294.24/x
  3. Step 3: Cross multiply
    879.18x = 1,318.99 × 294.24
  4. Step 4: Simplify right side
    879.18x = 388,098.15
  5. Step 5: Solve for x
    x = 388,098.15/879.18
  6. Step 6: Final answer
    x = 441.43

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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.