Home / 841.12-1,261.49-320.94

Finding the Fourth Proportional to 841.12, 1,261.49 and 320.94

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Solution

The fourth proportional to 841.12, 1,261.49 and 320.94 is: 481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.12 : 1,261.49 = 320.94 : x
  2. Step 2: Convert to fraction form
    841.12/1,261.49 = 320.94/x
  3. Step 3: Cross multiply
    841.12x = 1,261.49 × 320.94
  4. Step 4: Simplify right side
    841.12x = 404,854.69
  5. Step 5: Solve for x
    x = 404,854.69/841.12
  6. Step 6: Final answer
    x = 481.33

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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.