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Finding the Fourth Proportional to 316.88, 436.76 and 243.04

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Solution

The fourth proportional to 316.88, 436.76 and 243.04 is: 334.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.88 : 436.76 = 243.04 : x
  2. Step 2: Convert to fraction form
    316.88/436.76 = 243.04/x
  3. Step 3: Cross multiply
    316.88x = 436.76 × 243.04
  4. Step 4: Simplify right side
    316.88x = 106,150.15
  5. Step 5: Solve for x
    x = 106,150.15/316.88
  6. Step 6: Final answer
    x = 334.99

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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.