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Finding the Fourth Proportional to 841.17, 1,260.91 and 321.04

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Solution

The fourth proportional to 841.17, 1,260.91 and 321.04 is: 481.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.17 : 1,260.91 = 321.04 : x
  2. Step 2: Convert to fraction form
    841.17/1,260.91 = 321.04/x
  3. Step 3: Cross multiply
    841.17x = 1,260.91 × 321.04
  4. Step 4: Simplify right side
    841.17x = 404,802.55
  5. Step 5: Solve for x
    x = 404,802.55/841.17
  6. Step 6: Final answer
    x = 481.24

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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.