Home / 841.24-1,261.81-321.22

Finding the Fourth Proportional to 841.24, 1,261.81 and 321.22

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Solution

The fourth proportional to 841.24, 1,261.81 and 321.22 is: 481.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.24 : 1,261.81 = 321.22 : x
  2. Step 2: Convert to fraction form
    841.24/1,261.81 = 321.22/x
  3. Step 3: Cross multiply
    841.24x = 1,261.81 × 321.22
  4. Step 4: Simplify right side
    841.24x = 405,318.61
  5. Step 5: Solve for x
    x = 405,318.61/841.24
  6. Step 6: Final answer
    x = 481.81

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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.