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Finding the Fourth Proportional to 589.47, 813.23 and 379.61

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Solution

The fourth proportional to 589.47, 813.23 and 379.61 is: 523.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    589.47 : 813.23 = 379.61 : x
  2. Step 2: Convert to fraction form
    589.47/813.23 = 379.61/x
  3. Step 3: Cross multiply
    589.47x = 813.23 × 379.61
  4. Step 4: Simplify right side
    589.47x = 308,710.24
  5. Step 5: Solve for x
    x = 308,710.24/589.47
  6. Step 6: Final answer
    x = 523.71

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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.