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Finding the Fourth Proportional to 239.40, 358.74 and 130.86

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Solution

The fourth proportional to 239.40, 358.74 and 130.86 is: 196.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.40 : 358.74 = 130.86 : x
  2. Step 2: Convert to fraction form
    239.40/358.74 = 130.86/x
  3. Step 3: Cross multiply
    239.40x = 358.74 × 130.86
  4. Step 4: Simplify right side
    239.40x = 46,944.72
  5. Step 5: Solve for x
    x = 46,944.72/239.40
  6. Step 6: Final answer
    x = 196.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.