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Finding the Fourth Proportional to 519,720.50, 779,580.78 and 125,736.50

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Solution

The fourth proportional to 519,720.50, 779,580.78 and 125,736.50 is: 188,604.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,720.50 : 779,580.78 = 125,736.50 : x
  2. Step 2: Convert to fraction form
    519,720.50/779,580.78 = 125,736.50/x
  3. Step 3: Cross multiply
    519,720.50x = 779,580.78 × 125,736.50
  4. Step 4: Simplify right side
    519,720.50x = 98,021,758,744.47
  5. Step 5: Solve for x
    x = 98,021,758,744.47/519,720.50
  6. Step 6: Final answer
    x = 188,604.76

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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.