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Finding the Fourth Proportional to 216.83, 299.35 and 143.36

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Solution

The fourth proportional to 216.83, 299.35 and 143.36 is: 197.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.83 : 299.35 = 143.36 : x
  2. Step 2: Convert to fraction form
    216.83/299.35 = 143.36/x
  3. Step 3: Cross multiply
    216.83x = 299.35 × 143.36
  4. Step 4: Simplify right side
    216.83x = 42,914.08
  5. Step 5: Solve for x
    x = 42,914.08/216.83
  6. Step 6: Final answer
    x = 197.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.