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Finding the Fourth Proportional to 239.66, 357.59 and 216.62

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Solution

The fourth proportional to 239.66, 357.59 and 216.62 is: 323.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.66 : 357.59 = 216.62 : x
  2. Step 2: Convert to fraction form
    239.66/357.59 = 216.62/x
  3. Step 3: Cross multiply
    239.66x = 357.59 × 216.62
  4. Step 4: Simplify right side
    239.66x = 77,461.15
  5. Step 5: Solve for x
    x = 77,461.15/239.66
  6. Step 6: Final answer
    x = 323.21

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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.