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Finding the Fourth Proportional to 316.98, 436.34 and 275.36

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Solution

The fourth proportional to 316.98, 436.34 and 275.36 is: 379.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.98 : 436.34 = 275.36 : x
  2. Step 2: Convert to fraction form
    316.98/436.34 = 275.36/x
  3. Step 3: Cross multiply
    316.98x = 436.34 × 275.36
  4. Step 4: Simplify right side
    316.98x = 120,147.02
  5. Step 5: Solve for x
    x = 120,147.02/316.98
  6. Step 6: Final answer
    x = 379.04

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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.