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Finding the Fourth Proportional to 383,993.55, 529,923.83 and 209,573.28

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Solution

The fourth proportional to 383,993.55, 529,923.83 and 209,573.28 is: 289,218.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,993.55 : 529,923.83 = 209,573.28 : x
  2. Step 2: Convert to fraction form
    383,993.55/529,923.83 = 209,573.28/x
  3. Step 3: Cross multiply
    383,993.55x = 529,923.83 × 209,573.28
  4. Step 4: Simplify right side
    383,993.55x = 111,057,874,155.40
  5. Step 5: Solve for x
    x = 111,057,874,155.40/383,993.55
  6. Step 6: Final answer
    x = 289,218.07

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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.