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Finding the Fourth Proportional to 353.96, 531.16 and 148.67

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Solution

The fourth proportional to 353.96, 531.16 and 148.67 is: 223.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.96 : 531.16 = 148.67 : x
  2. Step 2: Convert to fraction form
    353.96/531.16 = 148.67/x
  3. Step 3: Cross multiply
    353.96x = 531.16 × 148.67
  4. Step 4: Simplify right side
    353.96x = 78,967.56
  5. Step 5: Solve for x
    x = 78,967.56/353.96
  6. Step 6: Final answer
    x = 223.10

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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.