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Finding the Fourth Proportional to 315.35, 435.41 and 248.86

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Solution

The fourth proportional to 315.35, 435.41 and 248.86 is: 343.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.35 : 435.41 = 248.86 : x
  2. Step 2: Convert to fraction form
    315.35/435.41 = 248.86/x
  3. Step 3: Cross multiply
    315.35x = 435.41 × 248.86
  4. Step 4: Simplify right side
    315.35x = 108,356.13
  5. Step 5: Solve for x
    x = 108,356.13/315.35
  6. Step 6: Final answer
    x = 343.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.