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Finding the Fourth Proportional to 325.10, 489.48 and 286.82

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Solution

The fourth proportional to 325.10, 489.48 and 286.82 is: 431.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.10 : 489.48 = 286.82 : x
  2. Step 2: Convert to fraction form
    325.10/489.48 = 286.82/x
  3. Step 3: Cross multiply
    325.10x = 489.48 × 286.82
  4. Step 4: Simplify right side
    325.10x = 140,390.21
  5. Step 5: Solve for x
    x = 140,390.21/325.10
  6. Step 6: Final answer
    x = 431.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.