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Finding the Fourth Proportional to 598.50, 898.17 and 213.75

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Solution

The fourth proportional to 598.50, 898.17 and 213.75 is: 320.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    598.50 : 898.17 = 213.75 : x
  2. Step 2: Convert to fraction form
    598.50/898.17 = 213.75/x
  3. Step 3: Cross multiply
    598.50x = 898.17 × 213.75
  4. Step 4: Simplify right side
    598.50x = 191,983.84
  5. Step 5: Solve for x
    x = 191,983.84/598.50
  6. Step 6: Final answer
    x = 320.78

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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.