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Finding the Fourth Proportional to 304.54, 420.47 and 201.18

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Solution

The fourth proportional to 304.54, 420.47 and 201.18 is: 277.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.54 : 420.47 = 201.18 : x
  2. Step 2: Convert to fraction form
    304.54/420.47 = 201.18/x
  3. Step 3: Cross multiply
    304.54x = 420.47 × 201.18
  4. Step 4: Simplify right side
    304.54x = 84,590.15
  5. Step 5: Solve for x
    x = 84,590.15/304.54
  6. Step 6: Final answer
    x = 277.76

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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.