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Finding the Fourth Proportional to 216.28, 322.99 and 203.50

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Solution

The fourth proportional to 216.28, 322.99 and 203.50 is: 303.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.28 : 322.99 = 203.50 : x
  2. Step 2: Convert to fraction form
    216.28/322.99 = 203.50/x
  3. Step 3: Cross multiply
    216.28x = 322.99 × 203.50
  4. Step 4: Simplify right side
    216.28x = 65,728.47
  5. Step 5: Solve for x
    x = 65,728.47/216.28
  6. Step 6: Final answer
    x = 303.90

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.