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Finding the Fourth Proportional to 358.92, 494.82 and 288.36

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Solution

The fourth proportional to 358.92, 494.82 and 288.36 is: 397.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.92 : 494.82 = 288.36 : x
  2. Step 2: Convert to fraction form
    358.92/494.82 = 288.36/x
  3. Step 3: Cross multiply
    358.92x = 494.82 × 288.36
  4. Step 4: Simplify right side
    358.92x = 142,686.30
  5. Step 5: Solve for x
    x = 142,686.30/358.92
  6. Step 6: Final answer
    x = 397.54

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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.