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Finding the Fourth Proportional to 519,771.30, 779,948.55 and 220,200.90

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Solution

The fourth proportional to 519,771.30, 779,948.55 and 220,200.90 is: 330,424.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,771.30 : 779,948.55 = 220,200.90 : x
  2. Step 2: Convert to fraction form
    519,771.30/779,948.55 = 220,200.90/x
  3. Step 3: Cross multiply
    519,771.30x = 779,948.55 × 220,200.90
  4. Step 4: Simplify right side
    519,771.30x = 171,745,372,663.70
  5. Step 5: Solve for x
    x = 171,745,372,663.70/519,771.30
  6. Step 6: Final answer
    x = 330,424.89

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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.