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Finding the Fourth Proportional to 316.64, 436.54 and 272.28

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Solution

The fourth proportional to 316.64, 436.54 and 272.28 is: 375.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.64 : 436.54 = 272.28 : x
  2. Step 2: Convert to fraction form
    316.64/436.54 = 272.28/x
  3. Step 3: Cross multiply
    316.64x = 436.54 × 272.28
  4. Step 4: Simplify right side
    316.64x = 118,861.11
  5. Step 5: Solve for x
    x = 118,861.11/316.64
  6. Step 6: Final answer
    x = 375.38

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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.