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Finding the Fourth Proportional to 419.52, 629.18 and 203.16

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Solution

The fourth proportional to 419.52, 629.18 and 203.16 is: 304.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.52 : 629.18 = 203.16 : x
  2. Step 2: Convert to fraction form
    419.52/629.18 = 203.16/x
  3. Step 3: Cross multiply
    419.52x = 629.18 × 203.16
  4. Step 4: Simplify right side
    419.52x = 127,824.21
  5. Step 5: Solve for x
    x = 127,824.21/419.52
  6. Step 6: Final answer
    x = 304.69

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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.