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Finding the Fourth Proportional to 638.25, 880.83 and 358.51

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Solution

The fourth proportional to 638.25, 880.83 and 358.51 is: 494.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.25 : 880.83 = 358.51 : x
  2. Step 2: Convert to fraction form
    638.25/880.83 = 358.51/x
  3. Step 3: Cross multiply
    638.25x = 880.83 × 358.51
  4. Step 4: Simplify right side
    638.25x = 315,786.36
  5. Step 5: Solve for x
    x = 315,786.36/638.25
  6. Step 6: Final answer
    x = 494.77

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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.