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Finding the Fourth Proportional to 263.96, 395.60 and 142.08

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Solution

The fourth proportional to 263.96, 395.60 and 142.08 is: 212.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.96 : 395.60 = 142.08 : x
  2. Step 2: Convert to fraction form
    263.96/395.60 = 142.08/x
  3. Step 3: Cross multiply
    263.96x = 395.60 × 142.08
  4. Step 4: Simplify right side
    263.96x = 56,206.14
  5. Step 5: Solve for x
    x = 56,206.14/263.96
  6. Step 6: Final answer
    x = 212.93

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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.