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Finding the Fourth Proportional to 422.91, 583.66 and 275.29

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Solution

The fourth proportional to 422.91, 583.66 and 275.29 is: 379.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    422.91 : 583.66 = 275.29 : x
  2. Step 2: Convert to fraction form
    422.91/583.66 = 275.29/x
  3. Step 3: Cross multiply
    422.91x = 583.66 × 275.29
  4. Step 4: Simplify right side
    422.91x = 160,674.65
  5. Step 5: Solve for x
    x = 160,674.65/422.91
  6. Step 6: Final answer
    x = 379.93

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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.