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Finding the Fourth Proportional to 386,871.83, 580,120.99 and 162,171.93

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Solution

The fourth proportional to 386,871.83, 580,120.99 and 162,171.93 is: 243,179.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,871.83 : 580,120.99 = 162,171.93 : x
  2. Step 2: Convert to fraction form
    386,871.83/580,120.99 = 162,171.93/x
  3. Step 3: Cross multiply
    386,871.83x = 580,120.99 × 162,171.93
  4. Step 4: Simplify right side
    386,871.83x = 94,079,340,581.81
  5. Step 5: Solve for x
    x = 94,079,340,581.81/386,871.83
  6. Step 6: Final answer
    x = 243,179.61

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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.