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Finding the Fourth Proportional to 312.68, 468.75 and 191.03

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Solution

The fourth proportional to 312.68, 468.75 and 191.03 is: 286.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.68 : 468.75 = 191.03 : x
  2. Step 2: Convert to fraction form
    312.68/468.75 = 191.03/x
  3. Step 3: Cross multiply
    312.68x = 468.75 × 191.03
  4. Step 4: Simplify right side
    312.68x = 89,542.97
  5. Step 5: Solve for x
    x = 89,542.97/312.68
  6. Step 6: Final answer
    x = 286.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.