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Finding the Fourth Proportional to 316.82, 436.87 and 275.02

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Solution

The fourth proportional to 316.82, 436.87 and 275.02 is: 379.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.82 : 436.87 = 275.02 : x
  2. Step 2: Convert to fraction form
    316.82/436.87 = 275.02/x
  3. Step 3: Cross multiply
    316.82x = 436.87 × 275.02
  4. Step 4: Simplify right side
    316.82x = 120,144.43
  5. Step 5: Solve for x
    x = 120,144.43/316.82
  6. Step 6: Final answer
    x = 379.22

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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.