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Finding the Fourth Proportional to 839.93, 1,259.88 and 254.92

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Solution

The fourth proportional to 839.93, 1,259.88 and 254.92 is: 382.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.93 : 1,259.88 = 254.92 : x
  2. Step 2: Convert to fraction form
    839.93/1,259.88 = 254.92/x
  3. Step 3: Cross multiply
    839.93x = 1,259.88 × 254.92
  4. Step 4: Simplify right side
    839.93x = 321,168.61
  5. Step 5: Solve for x
    x = 321,168.61/839.93
  6. Step 6: Final answer
    x = 382.38

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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.