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Finding the Fourth Proportional to 312.13, 468.19 and 190.15

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Solution

The fourth proportional to 312.13, 468.19 and 190.15 is: 285.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.13 : 468.19 = 190.15 : x
  2. Step 2: Convert to fraction form
    312.13/468.19 = 190.15/x
  3. Step 3: Cross multiply
    312.13x = 468.19 × 190.15
  4. Step 4: Simplify right side
    312.13x = 89,023.99
  5. Step 5: Solve for x
    x = 89,023.99/312.13
  6. Step 6: Final answer
    x = 285.22

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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.