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Finding the Fourth Proportional to 264.86, 398.66 and 239.70

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Solution

The fourth proportional to 264.86, 398.66 and 239.70 is: 360.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    264.86 : 398.66 = 239.70 : x
  2. Step 2: Convert to fraction form
    264.86/398.66 = 239.70/x
  3. Step 3: Cross multiply
    264.86x = 398.66 × 239.70
  4. Step 4: Simplify right side
    264.86x = 95,558.80
  5. Step 5: Solve for x
    x = 95,558.80/264.86
  6. Step 6: Final answer
    x = 360.80

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.