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Finding the Fourth Proportional to 407,138.72, 610,749.97 and 140,898.83

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Solution

The fourth proportional to 407,138.72, 610,749.97 and 140,898.83 is: 211,362.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,138.72 : 610,749.97 = 140,898.83 : x
  2. Step 2: Convert to fraction form
    407,138.72/610,749.97 = 140,898.83/x
  3. Step 3: Cross multiply
    407,138.72x = 610,749.97 × 140,898.83
  4. Step 4: Simplify right side
    407,138.72x = 86,053,952,789.54
  5. Step 5: Solve for x
    x = 86,053,952,789.54/407,138.72
  6. Step 6: Final answer
    x = 211,362.74

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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.