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Finding the Fourth Proportional to 466.12, 643.25 and 289.11

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Solution

The fourth proportional to 466.12, 643.25 and 289.11 is: 398.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.12 : 643.25 = 289.11 : x
  2. Step 2: Convert to fraction form
    466.12/643.25 = 289.11/x
  3. Step 3: Cross multiply
    466.12x = 643.25 × 289.11
  4. Step 4: Simplify right side
    466.12x = 185,970.01
  5. Step 5: Solve for x
    x = 185,970.01/466.12
  6. Step 6: Final answer
    x = 398.97

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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.