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Finding the Fourth Proportional to 304.96, 455.20 and 279.31

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Solution

The fourth proportional to 304.96, 455.20 and 279.31 is: 416.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.96 : 455.20 = 279.31 : x
  2. Step 2: Convert to fraction form
    304.96/455.20 = 279.31/x
  3. Step 3: Cross multiply
    304.96x = 455.20 × 279.31
  4. Step 4: Simplify right side
    304.96x = 127,141.91
  5. Step 5: Solve for x
    x = 127,141.91/304.96
  6. Step 6: Final answer
    x = 416.91

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.