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Finding the Fourth Proportional to 316.63, 436.74 and 275.11

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Solution

The fourth proportional to 316.63, 436.74 and 275.11 is: 379.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.63 : 436.74 = 275.11 : x
  2. Step 2: Convert to fraction form
    316.63/436.74 = 275.11/x
  3. Step 3: Cross multiply
    316.63x = 436.74 × 275.11
  4. Step 4: Simplify right side
    316.63x = 120,153.06
  5. Step 5: Solve for x
    x = 120,153.06/316.63
  6. Step 6: Final answer
    x = 379.47

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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.