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Finding the Fourth Proportional to 262,866.80, 394,300.20 and 172,665.20

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Solution

The fourth proportional to 262,866.80, 394,300.20 and 172,665.20 is: 258,997.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    262,866.80 : 394,300.20 = 172,665.20 : x
  2. Step 2: Convert to fraction form
    262,866.80/394,300.20 = 172,665.20/x
  3. Step 3: Cross multiply
    262,866.80x = 394,300.20 × 172,665.20
  4. Step 4: Simplify right side
    262,866.80x = 68,081,922,893.04
  5. Step 5: Solve for x
    x = 68,081,922,893.04/262,866.80
  6. Step 6: Final answer
    x = 258,997.80

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1.5x scale

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.