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Finding the Fourth Proportional to 519,969.60, 780,100.20 and 220,593.60

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Solution

The fourth proportional to 519,969.60, 780,100.20 and 220,593.60 is: 330,952.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,969.60 : 780,100.20 = 220,593.60 : x
  2. Step 2: Convert to fraction form
    519,969.60/780,100.20 = 220,593.60/x
  3. Step 3: Cross multiply
    519,969.60x = 780,100.20 × 220,593.60
  4. Step 4: Simplify right side
    519,969.60x = 172,085,111,478.72
  5. Step 5: Solve for x
    x = 172,085,111,478.72/519,969.60
  6. Step 6: Final answer
    x = 330,952.25

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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.