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Finding the Fourth Proportional to 789.95, 1,179.23 and 754.45

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Solution

The fourth proportional to 789.95, 1,179.23 and 754.45 is: 1,126.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    789.95 : 1,179.23 = 754.45 : x
  2. Step 2: Convert to fraction form
    789.95/1,179.23 = 754.45/x
  3. Step 3: Cross multiply
    789.95x = 1,179.23 × 754.45
  4. Step 4: Simplify right side
    789.95x = 889,663.35
  5. Step 5: Solve for x
    x = 889,663.35/789.95
  6. Step 6: Final answer
    x = 1,126.22

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.