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Finding the Fourth Proportional to 782.80, 1,174.20 and 295.89

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Solution

The fourth proportional to 782.80, 1,174.20 and 295.89 is: 443.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.80 : 1,174.20 = 295.89 : x
  2. Step 2: Convert to fraction form
    782.80/1,174.20 = 295.89/x
  3. Step 3: Cross multiply
    782.80x = 1,174.20 × 295.89
  4. Step 4: Simplify right side
    782.80x = 347,428.53
  5. Step 5: Solve for x
    x = 347,428.53/782.80
  6. Step 6: Final answer
    x = 443.83

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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.