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Finding the Fourth Proportional to 387,105.94, 580,658.68 and 120,889.27

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Solution

The fourth proportional to 387,105.94, 580,658.68 and 120,889.27 is: 181,333.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,105.94 : 580,658.68 = 120,889.27 : x
  2. Step 2: Convert to fraction form
    387,105.94/580,658.68 = 120,889.27/x
  3. Step 3: Cross multiply
    387,105.94x = 580,658.68 × 120,889.27
  4. Step 4: Simplify right side
    387,105.94x = 70,195,403,944.36
  5. Step 5: Solve for x
    x = 70,195,403,944.36/387,105.94
  6. Step 6: Final answer
    x = 181,333.83

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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.