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Finding the Fourth Proportional to 312.79, 468.88 and 150.38

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Solution

The fourth proportional to 312.79, 468.88 and 150.38 is: 225.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.79 : 468.88 = 150.38 : x
  2. Step 2: Convert to fraction form
    312.79/468.88 = 150.38/x
  3. Step 3: Cross multiply
    312.79x = 468.88 × 150.38
  4. Step 4: Simplify right side
    312.79x = 70,510.17
  5. Step 5: Solve for x
    x = 70,510.17/312.79
  6. Step 6: Final answer
    x = 225.42

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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.