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Finding the Fourth Proportional to 465.48, 643.17 and 382.52

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Solution

The fourth proportional to 465.48, 643.17 and 382.52 is: 528.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    465.48 : 643.17 = 382.52 : x
  2. Step 2: Convert to fraction form
    465.48/643.17 = 382.52/x
  3. Step 3: Cross multiply
    465.48x = 643.17 × 382.52
  4. Step 4: Simplify right side
    465.48x = 246,028.43
  5. Step 5: Solve for x
    x = 246,028.43/465.48
  6. Step 6: Final answer
    x = 528.55

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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.