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Finding the Fourth Proportional to 398,812.45, 550,367.73 and 217,524.37

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Solution

The fourth proportional to 398,812.45, 550,367.73 and 217,524.37 is: 300,187.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,812.45 : 550,367.73 = 217,524.37 : x
  2. Step 2: Convert to fraction form
    398,812.45/550,367.73 = 217,524.37/x
  3. Step 3: Cross multiply
    398,812.45x = 550,367.73 × 217,524.37
  4. Step 4: Simplify right side
    398,812.45x = 119,718,393,736.58
  5. Step 5: Solve for x
    x = 119,718,393,736.58/398,812.45
  6. Step 6: Final answer
    x = 300,187.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.