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Finding the Fourth Proportional to 782.76, 1,173.81 and 235.02

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Solution

The fourth proportional to 782.76, 1,173.81 and 235.02 is: 352.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    782.76 : 1,173.81 = 235.02 : x
  2. Step 2: Convert to fraction form
    782.76/1,173.81 = 235.02/x
  3. Step 3: Cross multiply
    782.76x = 1,173.81 × 235.02
  4. Step 4: Simplify right side
    782.76x = 275,868.83
  5. Step 5: Solve for x
    x = 275,868.83/782.76
  6. Step 6: Final answer
    x = 352.43

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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.