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Finding the Fourth Proportional to 263.70, 395.75 and 142.00

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Solution

The fourth proportional to 263.70, 395.75 and 142.00 is: 213.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.70 : 395.75 = 142.00 : x
  2. Step 2: Convert to fraction form
    263.70/395.75 = 142.00/x
  3. Step 3: Cross multiply
    263.70x = 395.75 × 142.00
  4. Step 4: Simplify right side
    263.70x = 56,195.87
  5. Step 5: Solve for x
    x = 56,195.87/263.70
  6. Step 6: Final answer
    x = 213.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.