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Finding the Fourth Proportional to 239.76, 330.93 and 157.10

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Solution

The fourth proportional to 239.76, 330.93 and 157.10 is: 216.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.76 : 330.93 = 157.10 : x
  2. Step 2: Convert to fraction form
    239.76/330.93 = 157.10/x
  3. Step 3: Cross multiply
    239.76x = 330.93 × 157.10
  4. Step 4: Simplify right side
    239.76x = 51,987.45
  5. Step 5: Solve for x
    x = 51,987.45/239.76
  6. Step 6: Final answer
    x = 216.83

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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.