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Finding the Fourth Proportional to 326,980.50, 490,470.09 and 90,322.48

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Solution

The fourth proportional to 326,980.50, 490,470.09 and 90,322.48 is: 135,483.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,980.50 : 490,470.09 = 90,322.48 : x
  2. Step 2: Convert to fraction form
    326,980.50/490,470.09 = 90,322.48/x
  3. Step 3: Cross multiply
    326,980.50x = 490,470.09 × 90,322.48
  4. Step 4: Simplify right side
    326,980.50x = 44,300,474,894.62
  5. Step 5: Solve for x
    x = 44,300,474,894.62/326,980.50
  6. Step 6: Final answer
    x = 135,483.54

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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.