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Finding the Fourth Proportional to 304.67, 420.43 and 171.89

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Solution

The fourth proportional to 304.67, 420.43 and 171.89 is: 237.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.67 : 420.43 = 171.89 : x
  2. Step 2: Convert to fraction form
    304.67/420.43 = 171.89/x
  3. Step 3: Cross multiply
    304.67x = 420.43 × 171.89
  4. Step 4: Simplify right side
    304.67x = 72,266.85
  5. Step 5: Solve for x
    x = 72,266.85/304.67
  6. Step 6: Final answer
    x = 237.20

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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.