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Finding the Fourth Proportional to 419.60, 628.38 and 327.53

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Solution

The fourth proportional to 419.60, 628.38 and 327.53 is: 490.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.60 : 628.38 = 327.53 : x
  2. Step 2: Convert to fraction form
    419.60/628.38 = 327.53/x
  3. Step 3: Cross multiply
    419.60x = 628.38 × 327.53
  4. Step 4: Simplify right side
    419.60x = 205,810.16
  5. Step 5: Solve for x
    x = 205,810.16/419.60
  6. Step 6: Final answer
    x = 490.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.