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Finding the Fourth Proportional to 312.90, 469.25 and 150.48

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Solution

The fourth proportional to 312.90, 469.25 and 150.48 is: 225.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.90 : 469.25 = 150.48 : x
  2. Step 2: Convert to fraction form
    312.90/469.25 = 150.48/x
  3. Step 3: Cross multiply
    312.90x = 469.25 × 150.48
  4. Step 4: Simplify right side
    312.90x = 70,611.99
  5. Step 5: Solve for x
    x = 70,611.99/312.90
  6. Step 6: Final answer
    x = 225.67

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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.