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Finding the Fourth Proportional to 782.86, 1,174.20 and 349.96

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Solution

The fourth proportional to 782.86, 1,174.20 and 349.96 is: 524.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.86 : 1,174.20 = 349.96 : x
  2. Step 2: Convert to fraction form
    782.86/1,174.20 = 349.96/x
  3. Step 3: Cross multiply
    782.86x = 1,174.20 × 349.96
  4. Step 4: Simplify right side
    782.86x = 410,923.03
  5. Step 5: Solve for x
    x = 410,923.03/782.86
  6. Step 6: Final answer
    x = 524.90

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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.