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Finding the Fourth Proportional to 481.98, 665.61 and 465.90

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Solution

The fourth proportional to 481.98, 665.61 and 465.90 is: 643.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.98 : 665.61 = 465.90 : x
  2. Step 2: Convert to fraction form
    481.98/665.61 = 465.90/x
  3. Step 3: Cross multiply
    481.98x = 665.61 × 465.90
  4. Step 4: Simplify right side
    481.98x = 310,107.70
  5. Step 5: Solve for x
    x = 310,107.70/481.98
  6. Step 6: Final answer
    x = 643.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.