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Finding the Fourth Proportional to 326,908.81, 490,362.49 and 87,022.77

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Solution

The fourth proportional to 326,908.81, 490,362.49 and 87,022.77 is: 130,533.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,908.81 : 490,362.49 = 87,022.77 : x
  2. Step 2: Convert to fraction form
    326,908.81/490,362.49 = 87,022.77/x
  3. Step 3: Cross multiply
    326,908.81x = 490,362.49 × 87,022.77
  4. Step 4: Simplify right side
    326,908.81x = 42,672,702,183.90
  5. Step 5: Solve for x
    x = 42,672,702,183.90/326,908.81
  6. Step 6: Final answer
    x = 130,533.96

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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.