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Finding the Fourth Proportional to 927.15, 1,279.40 and 573.58

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Solution

The fourth proportional to 927.15, 1,279.40 and 573.58 is: 791.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.15 : 1,279.40 = 573.58 : x
  2. Step 2: Convert to fraction form
    927.15/1,279.40 = 573.58/x
  3. Step 3: Cross multiply
    927.15x = 1,279.40 × 573.58
  4. Step 4: Simplify right side
    927.15x = 733,836.98
  5. Step 5: Solve for x
    x = 733,836.98/927.15
  6. Step 6: Final answer
    x = 791.50

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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.