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Finding the Fourth Proportional to 304.70, 457.20 and 231.55

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Solution

The fourth proportional to 304.70, 457.20 and 231.55 is: 347.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.70 : 457.20 = 231.55 : x
  2. Step 2: Convert to fraction form
    304.70/457.20 = 231.55/x
  3. Step 3: Cross multiply
    304.70x = 457.20 × 231.55
  4. Step 4: Simplify right side
    304.70x = 105,864.66
  5. Step 5: Solve for x
    x = 105,864.66/304.70
  6. Step 6: Final answer
    x = 347.44

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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.