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Finding the Fourth Proportional to 304.49, 420.15 and 171.70

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Solution

The fourth proportional to 304.49, 420.15 and 171.70 is: 236.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.49 : 420.15 = 171.70 : x
  2. Step 2: Convert to fraction form
    304.49/420.15 = 171.70/x
  3. Step 3: Cross multiply
    304.49x = 420.15 × 171.70
  4. Step 4: Simplify right side
    304.49x = 72,141.23
  5. Step 5: Solve for x
    x = 72,141.23/304.49
  6. Step 6: Final answer
    x = 236.93

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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.