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Finding the Fourth Proportional to 419.59, 628.95 and 203.05

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Solution

The fourth proportional to 419.59, 628.95 and 203.05 is: 304.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    419.59 : 628.95 = 203.05 : x
  2. Step 2: Convert to fraction form
    419.59/628.95 = 203.05/x
  3. Step 3: Cross multiply
    419.59x = 628.95 × 203.05
  4. Step 4: Simplify right side
    419.59x = 127,705.15
  5. Step 5: Solve for x
    x = 127,705.15/419.59
  6. Step 6: Final answer
    x = 304.36

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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.