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Finding the Fourth Proportional to 417.93, 626.66 and 331.82

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Solution

The fourth proportional to 417.93, 626.66 and 331.82 is: 497.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.93 : 626.66 = 331.82 : x
  2. Step 2: Convert to fraction form
    417.93/626.66 = 331.82/x
  3. Step 3: Cross multiply
    417.93x = 626.66 × 331.82
  4. Step 4: Simplify right side
    417.93x = 207,936.64
  5. Step 5: Solve for x
    x = 207,936.64/417.93
  6. Step 6: Final answer
    x = 497.54

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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.