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Finding the Fourth Proportional to 304.92, 457.28 and 253.89

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Solution

The fourth proportional to 304.92, 457.28 and 253.89 is: 380.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.92 : 457.28 = 253.89 : x
  2. Step 2: Convert to fraction form
    304.92/457.28 = 253.89/x
  3. Step 3: Cross multiply
    304.92x = 457.28 × 253.89
  4. Step 4: Simplify right side
    304.92x = 116,098.50
  5. Step 5: Solve for x
    x = 116,098.50/304.92
  6. Step 6: Final answer
    x = 380.75

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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.