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Finding the Fourth Proportional to 316.39, 436.35 and 254.20

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Solution

The fourth proportional to 316.39, 436.35 and 254.20 is: 350.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.39 : 436.35 = 254.20 : x
  2. Step 2: Convert to fraction form
    316.39/436.35 = 254.20/x
  3. Step 3: Cross multiply
    316.39x = 436.35 × 254.20
  4. Step 4: Simplify right side
    316.39x = 110,920.17
  5. Step 5: Solve for x
    x = 110,920.17/316.39
  6. Step 6: Final answer
    x = 350.58

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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.