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Finding the Fourth Proportional to 782.45, 1,173.68 and 234.64

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Solution

The fourth proportional to 782.45, 1,173.68 and 234.64 is: 351.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.45 : 1,173.68 = 234.64 : x
  2. Step 2: Convert to fraction form
    782.45/1,173.68 = 234.64/x
  3. Step 3: Cross multiply
    782.45x = 1,173.68 × 234.64
  4. Step 4: Simplify right side
    782.45x = 275,386.85
  5. Step 5: Solve for x
    x = 275,386.85/782.45
  6. Step 6: Final answer
    x = 351.96

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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.