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Finding the Fourth Proportional to 319.32, 479.10 and 239.16

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Solution

The fourth proportional to 319.32, 479.10 and 239.16 is: 358.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.32 : 479.10 = 239.16 : x
  2. Step 2: Convert to fraction form
    319.32/479.10 = 239.16/x
  3. Step 3: Cross multiply
    319.32x = 479.10 × 239.16
  4. Step 4: Simplify right side
    319.32x = 114,581.56
  5. Step 5: Solve for x
    x = 114,581.56/319.32
  6. Step 6: Final answer
    x = 358.83

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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.