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Finding the Fourth Proportional to 654,047.20, 981,697.20 and 338,730.40

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Solution

The fourth proportional to 654,047.20, 981,697.20 and 338,730.40 is: 508,420.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,047.20 : 981,697.20 = 338,730.40 : x
  2. Step 2: Convert to fraction form
    654,047.20/981,697.20 = 338,730.40/x
  3. Step 3: Cross multiply
    654,047.20x = 981,697.20 × 338,730.40
  4. Step 4: Simplify right side
    654,047.20x = 332,530,685,234.88
  5. Step 5: Solve for x
    x = 332,530,685,234.88/654,047.20
  6. Step 6: Final answer
    x = 508,420.01

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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.