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Finding the Fourth Proportional to 262,964, 394,446 and 87,860

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Solution

The fourth proportional to 262,964, 394,446 and 87,860 is: 131,790

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,964 : 394,446 = 87,860 : x
  2. Step 2: Convert to fraction form
    262,964/394,446 = 87,860/x
  3. Step 3: Cross multiply
    262,964x = 394,446 × 87,860
  4. Step 4: Simplify right side
    262,964x = 34,656,025,560
  5. Step 5: Solve for x
    x = 34,656,025,560/262,964
  6. Step 6: Final answer
    x = 131,790

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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.