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Finding the Fourth Proportional to 839.53, 1,259.24 and 262.39

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Solution

The fourth proportional to 839.53, 1,259.24 and 262.39 is: 393.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.53 : 1,259.24 = 262.39 : x
  2. Step 2: Convert to fraction form
    839.53/1,259.24 = 262.39/x
  3. Step 3: Cross multiply
    839.53x = 1,259.24 × 262.39
  4. Step 4: Simplify right side
    839.53x = 330,410.67
  5. Step 5: Solve for x
    x = 330,410.67/839.53
  6. Step 6: Final answer
    x = 393.57

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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.