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Finding the Fourth Proportional to 419.48, 629.19 and 202.40

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Solution

The fourth proportional to 419.48, 629.19 and 202.40 is: 303.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.48 : 629.19 = 202.40 : x
  2. Step 2: Convert to fraction form
    419.48/629.19 = 202.40/x
  3. Step 3: Cross multiply
    419.48x = 629.19 × 202.40
  4. Step 4: Simplify right side
    419.48x = 127,348.06
  5. Step 5: Solve for x
    x = 127,348.06/419.48
  6. Step 6: Final answer
    x = 303.59

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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.