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Finding the Fourth Proportional to 519,389.36, 780,453.98 and 279,680.48

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Solution

The fourth proportional to 519,389.36, 780,453.98 and 279,680.48 is: 420,258.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,389.36 : 780,453.98 = 279,680.48 : x
  2. Step 2: Convert to fraction form
    519,389.36/780,453.98 = 279,680.48/x
  3. Step 3: Cross multiply
    519,389.36x = 780,453.98 × 279,680.48
  4. Step 4: Simplify right side
    519,389.36x = 218,277,738,443.64
  5. Step 5: Solve for x
    x = 218,277,738,443.64/519,389.36
  6. Step 6: Final answer
    x = 420,258.40

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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.