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Finding the Fourth Proportional to 311.76, 468.32 and 190.10

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Solution

The fourth proportional to 311.76, 468.32 and 190.10 is: 285.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    311.76 : 468.32 = 190.10 : x
  2. Step 2: Convert to fraction form
    311.76/468.32 = 190.10/x
  3. Step 3: Cross multiply
    311.76x = 468.32 × 190.10
  4. Step 4: Simplify right side
    311.76x = 89,024.34
  5. Step 5: Solve for x
    x = 89,024.34/311.76
  6. Step 6: Final answer
    x = 285.55

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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.