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Finding the Fourth Proportional to 312.85, 469.23 and 93.48

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Solution

The fourth proportional to 312.85, 469.23 and 93.48 is: 140.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.85 : 469.23 = 93.48 : x
  2. Step 2: Convert to fraction form
    312.85/469.23 = 93.48/x
  3. Step 3: Cross multiply
    312.85x = 469.23 × 93.48
  4. Step 4: Simplify right side
    312.85x = 43,863.62
  5. Step 5: Solve for x
    x = 43,863.62/312.85
  6. Step 6: Final answer
    x = 140.21

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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.