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Finding the Fourth Proportional to 239.15, 358.57 and 130.91

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Solution

The fourth proportional to 239.15, 358.57 and 130.91 is: 196.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.15 : 358.57 = 130.91 : x
  2. Step 2: Convert to fraction form
    239.15/358.57 = 130.91/x
  3. Step 3: Cross multiply
    239.15x = 358.57 × 130.91
  4. Step 4: Simplify right side
    239.15x = 46,939.74
  5. Step 5: Solve for x
    x = 46,939.74/239.15
  6. Step 6: Final answer
    x = 196.28

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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.