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Finding the Fourth Proportional to 839.73, 1,259.94 and 377.20

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Solution

The fourth proportional to 839.73, 1,259.94 and 377.20 is: 565.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.73 : 1,259.94 = 377.20 : x
  2. Step 2: Convert to fraction form
    839.73/1,259.94 = 377.20/x
  3. Step 3: Cross multiply
    839.73x = 1,259.94 × 377.20
  4. Step 4: Simplify right side
    839.73x = 475,249.37
  5. Step 5: Solve for x
    x = 475,249.37/839.73
  6. Step 6: Final answer
    x = 565.95

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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.