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Finding the Fourth Proportional to 255.09, 351.90 and 192.90

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Solution

The fourth proportional to 255.09, 351.90 and 192.90 is: 266.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.09 : 351.90 = 192.90 : x
  2. Step 2: Convert to fraction form
    255.09/351.90 = 192.90/x
  3. Step 3: Cross multiply
    255.09x = 351.90 × 192.90
  4. Step 4: Simplify right side
    255.09x = 67,881.51
  5. Step 5: Solve for x
    x = 67,881.51/255.09
  6. Step 6: Final answer
    x = 266.11

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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.