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Finding the Fourth Proportional to 316.95, 477.41 and 308.75

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Solution

The fourth proportional to 316.95, 477.41 and 308.75 is: 465.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    316.95 : 477.41 = 308.75 : x
  2. Step 2: Convert to fraction form
    316.95/477.41 = 308.75/x
  3. Step 3: Cross multiply
    316.95x = 477.41 × 308.75
  4. Step 4: Simplify right side
    316.95x = 147,396.41
  5. Step 5: Solve for x
    x = 147,396.41/316.95
  6. Step 6: Final answer
    x = 465.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.