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Finding the Fourth Proportional to 481.66, 717.95 and 429.33

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Solution

The fourth proportional to 481.66, 717.95 and 429.33 is: 639.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.66 : 717.95 = 429.33 : x
  2. Step 2: Convert to fraction form
    481.66/717.95 = 429.33/x
  3. Step 3: Cross multiply
    481.66x = 717.95 × 429.33
  4. Step 4: Simplify right side
    481.66x = 308,237.47
  5. Step 5: Solve for x
    x = 308,237.47/481.66
  6. Step 6: Final answer
    x = 639.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.