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Finding the Fourth Proportional to 325.84, 488.78 and 216.87

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Solution

The fourth proportional to 325.84, 488.78 and 216.87 is: 325.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    325.84 : 488.78 = 216.87 : x
  2. Step 2: Convert to fraction form
    325.84/488.78 = 216.87/x
  3. Step 3: Cross multiply
    325.84x = 488.78 × 216.87
  4. Step 4: Simplify right side
    325.84x = 106,001.72
  5. Step 5: Solve for x
    x = 106,001.72/325.84
  6. Step 6: Final answer
    x = 325.32

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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.