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Finding the Fourth Proportional to 262,660, 393,990 and 65,668

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Solution

The fourth proportional to 262,660, 393,990 and 65,668 is: 98,502

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,660 : 393,990 = 65,668 : x
  2. Step 2: Convert to fraction form
    262,660/393,990 = 65,668/x
  3. Step 3: Cross multiply
    262,660x = 393,990 × 65,668
  4. Step 4: Simplify right side
    262,660x = 25,872,535,320
  5. Step 5: Solve for x
    x = 25,872,535,320/262,660
  6. Step 6: Final answer
    x = 98,502

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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.