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Finding the Fourth Proportional to 255.38, 351.83 and 210.83

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Solution

The fourth proportional to 255.38, 351.83 and 210.83 is: 290.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.38 : 351.83 = 210.83 : x
  2. Step 2: Convert to fraction form
    255.38/351.83 = 210.83/x
  3. Step 3: Cross multiply
    255.38x = 351.83 × 210.83
  4. Step 4: Simplify right side
    255.38x = 74,175.26
  5. Step 5: Solve for x
    x = 74,175.26/255.38
  6. Step 6: Final answer
    x = 290.45

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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.