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Finding the Fourth Proportional to 466.71, 643.26 and 319.08

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Solution

The fourth proportional to 466.71, 643.26 and 319.08 is: 439.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    466.71 : 643.26 = 319.08 : x
  2. Step 2: Convert to fraction form
    466.71/643.26 = 319.08/x
  3. Step 3: Cross multiply
    466.71x = 643.26 × 319.08
  4. Step 4: Simplify right side
    466.71x = 205,251.40
  5. Step 5: Solve for x
    x = 205,251.40/466.71
  6. Step 6: Final answer
    x = 439.78

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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.