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Finding the Fourth Proportional to 927.93, 1,279.21 and 573.61

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Solution

The fourth proportional to 927.93, 1,279.21 and 573.61 is: 790.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.93 : 1,279.21 = 573.61 : x
  2. Step 2: Convert to fraction form
    927.93/1,279.21 = 573.61/x
  3. Step 3: Cross multiply
    927.93x = 1,279.21 × 573.61
  4. Step 4: Simplify right side
    927.93x = 733,767.65
  5. Step 5: Solve for x
    x = 733,767.65/927.93
  6. Step 6: Final answer
    x = 790.76

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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.