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Finding the Fourth Proportional to 782.82, 1,174.50 and 349.74

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Solution

The fourth proportional to 782.82, 1,174.50 and 349.74 is: 524.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.82 : 1,174.50 = 349.74 : x
  2. Step 2: Convert to fraction form
    782.82/1,174.50 = 349.74/x
  3. Step 3: Cross multiply
    782.82x = 1,174.50 × 349.74
  4. Step 4: Simplify right side
    782.82x = 410,769.63
  5. Step 5: Solve for x
    x = 410,769.63/782.82
  6. Step 6: Final answer
    x = 524.73

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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.