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Finding the Fourth Proportional to 389.30, 582.87 and 196.52

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Solution

The fourth proportional to 389.30, 582.87 and 196.52 is: 294.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    389.30 : 582.87 = 196.52 : x
  2. Step 2: Convert to fraction form
    389.30/582.87 = 196.52/x
  3. Step 3: Cross multiply
    389.30x = 582.87 × 196.52
  4. Step 4: Simplify right side
    389.30x = 114,545.61
  5. Step 5: Solve for x
    x = 114,545.61/389.30
  6. Step 6: Final answer
    x = 294.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.