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Finding the Fourth Proportional to 411.22, 617.14 and 307.36

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Solution

The fourth proportional to 411.22, 617.14 and 307.36 is: 461.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    411.22 : 617.14 = 307.36 : x
  2. Step 2: Convert to fraction form
    411.22/617.14 = 307.36/x
  3. Step 3: Cross multiply
    411.22x = 617.14 × 307.36
  4. Step 4: Simplify right side
    411.22x = 189,685.31
  5. Step 5: Solve for x
    x = 189,685.31/411.22
  6. Step 6: Final answer
    x = 461.27

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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.