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Finding the Fourth Proportional to 782.06, 1,172.93 and 234.27

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Solution

The fourth proportional to 782.06, 1,172.93 and 234.27 is: 351.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.06 : 1,172.93 = 234.27 : x
  2. Step 2: Convert to fraction form
    782.06/1,172.93 = 234.27/x
  3. Step 3: Cross multiply
    782.06x = 1,172.93 × 234.27
  4. Step 4: Simplify right side
    782.06x = 274,781.14
  5. Step 5: Solve for x
    x = 274,781.14/782.06
  6. Step 6: Final answer
    x = 351.36

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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.