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Finding the Fourth Proportional to 1,153.42, 1,729.92 and 331.67

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Solution

The fourth proportional to 1,153.42, 1,729.92 and 331.67 is: 497.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.42 : 1,729.92 = 331.67 : x
  2. Step 2: Convert to fraction form
    1,153.42/1,729.92 = 331.67/x
  3. Step 3: Cross multiply
    1,153.42x = 1,729.92 × 331.67
  4. Step 4: Simplify right side
    1,153.42x = 573,762.57
  5. Step 5: Solve for x
    x = 573,762.57/1,153.42
  6. Step 6: Final answer
    x = 497.44

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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.