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Finding the Fourth Proportional to 1,299.34, 1,793.80 and 879.56

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Solution

The fourth proportional to 1,299.34, 1,793.80 and 879.56 is: 1,214.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,299.34 : 1,793.80 = 879.56 : x
  2. Step 2: Convert to fraction form
    1,299.34/1,793.80 = 879.56/x
  3. Step 3: Cross multiply
    1,299.34x = 1,793.80 × 879.56
  4. Step 4: Simplify right side
    1,299.34x = 1,577,748.64
  5. Step 5: Solve for x
    x = 1,577,748.64/1,299.34
  6. Step 6: Final answer
    x = 1,214.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.