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Finding the Fourth Proportional to 519,629.70, 778,861.35 and 220,059.30

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Solution

The fourth proportional to 519,629.70, 778,861.35 and 220,059.30 is: 329,841.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,629.70 : 778,861.35 = 220,059.30 : x
  2. Step 2: Convert to fraction form
    519,629.70/778,861.35 = 220,059.30/x
  3. Step 3: Cross multiply
    519,629.70x = 778,861.35 × 220,059.30
  4. Step 4: Simplify right side
    519,629.70x = 171,395,683,478.06
  5. Step 5: Solve for x
    x = 171,395,683,478.06/519,629.70
  6. Step 6: Final answer
    x = 329,841.97

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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.