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Finding the Fourth Proportional to 352.09, 486.09 and 316.63

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Solution

The fourth proportional to 352.09, 486.09 and 316.63 is: 437.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.09 : 486.09 = 316.63 : x
  2. Step 2: Convert to fraction form
    352.09/486.09 = 316.63/x
  3. Step 3: Cross multiply
    352.09x = 486.09 × 316.63
  4. Step 4: Simplify right side
    352.09x = 153,910.68
  5. Step 5: Solve for x
    x = 153,910.68/352.09
  6. Step 6: Final answer
    x = 437.13

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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.