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Finding the Fourth Proportional to 239.93, 330.98 and 157.17

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Solution

The fourth proportional to 239.93, 330.98 and 157.17 is: 216.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.93 : 330.98 = 157.17 : x
  2. Step 2: Convert to fraction form
    239.93/330.98 = 157.17/x
  3. Step 3: Cross multiply
    239.93x = 330.98 × 157.17
  4. Step 4: Simplify right side
    239.93x = 52,019.34
  5. Step 5: Solve for x
    x = 52,019.34/239.93
  6. Step 6: Final answer
    x = 216.82

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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.