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Finding the Fourth Proportional to 255.55, 352.63 and 143.51

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Solution

The fourth proportional to 255.55, 352.63 and 143.51 is: 198.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    255.55 : 352.63 = 143.51 : x
  2. Step 2: Convert to fraction form
    255.55/352.63 = 143.51/x
  3. Step 3: Cross multiply
    255.55x = 352.63 × 143.51
  4. Step 4: Simplify right side
    255.55x = 50,605.21
  5. Step 5: Solve for x
    x = 50,605.21/255.55
  6. Step 6: Final answer
    x = 198.03

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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.