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Finding the Fourth Proportional to 239.26, 358.69 and 102.40

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Solution

The fourth proportional to 239.26, 358.69 and 102.40 is: 153.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.26 : 358.69 = 102.40 : x
  2. Step 2: Convert to fraction form
    239.26/358.69 = 102.40/x
  3. Step 3: Cross multiply
    239.26x = 358.69 × 102.40
  4. Step 4: Simplify right side
    239.26x = 36,729.86
  5. Step 5: Solve for x
    x = 36,729.86/239.26
  6. Step 6: Final answer
    x = 153.51

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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.