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Finding the Fourth Proportional to 466.17, 643.26 and 309.03

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Solution

The fourth proportional to 466.17, 643.26 and 309.03 is: 426.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.17 : 643.26 = 309.03 : x
  2. Step 2: Convert to fraction form
    466.17/643.26 = 309.03/x
  3. Step 3: Cross multiply
    466.17x = 643.26 × 309.03
  4. Step 4: Simplify right side
    466.17x = 198,786.64
  5. Step 5: Solve for x
    x = 198,786.64/466.17
  6. Step 6: Final answer
    x = 426.43

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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.