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Finding the Fourth Proportional to 348.24, 521.76 and 239.64

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Solution

The fourth proportional to 348.24, 521.76 and 239.64 is: 359.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.24 : 521.76 = 239.64 : x
  2. Step 2: Convert to fraction form
    348.24/521.76 = 239.64/x
  3. Step 3: Cross multiply
    348.24x = 521.76 × 239.64
  4. Step 4: Simplify right side
    348.24x = 125,034.57
  5. Step 5: Solve for x
    x = 125,034.57/348.24
  6. Step 6: Final answer
    x = 359.05

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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.