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Finding the Fourth Proportional to 316.68, 435.90 and 304.38

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Solution

The fourth proportional to 316.68, 435.90 and 304.38 is: 418.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.68 : 435.90 = 304.38 : x
  2. Step 2: Convert to fraction form
    316.68/435.90 = 304.38/x
  3. Step 3: Cross multiply
    316.68x = 435.90 × 304.38
  4. Step 4: Simplify right side
    316.68x = 132,679.24
  5. Step 5: Solve for x
    x = 132,679.24/316.68
  6. Step 6: Final answer
    x = 418.97

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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.