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Finding the Fourth Proportional to 519,771.60, 779,735.88 and 220,253.40

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Solution

The fourth proportional to 519,771.60, 779,735.88 and 220,253.40 is: 330,413.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,771.60 : 779,735.88 = 220,253.40 : x
  2. Step 2: Convert to fraction form
    519,771.60/779,735.88 = 220,253.40/x
  3. Step 3: Cross multiply
    519,771.60x = 779,735.88 × 220,253.40
  4. Step 4: Simplify right side
    519,771.60x = 171,739,478,671.99
  5. Step 5: Solve for x
    x = 171,739,478,671.99/519,771.60
  6. Step 6: Final answer
    x = 330,413.36

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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.