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Finding the Fourth Proportional to 239.48, 359.26 and 131.40

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Solution

The fourth proportional to 239.48, 359.26 and 131.40 is: 197.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.48 : 359.26 = 131.40 : x
  2. Step 2: Convert to fraction form
    239.48/359.26 = 131.40/x
  3. Step 3: Cross multiply
    239.48x = 359.26 × 131.40
  4. Step 4: Simplify right side
    239.48x = 47,206.76
  5. Step 5: Solve for x
    x = 47,206.76/239.48
  6. Step 6: Final answer
    x = 197.12

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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.