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Finding the Fourth Proportional to 519,367.68, 780,906.24 and 478,310.40

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Solution

The fourth proportional to 519,367.68, 780,906.24 and 478,310.40 is: 719,173.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,367.68 : 780,906.24 = 478,310.40 : x
  2. Step 2: Convert to fraction form
    519,367.68/780,906.24 = 478,310.40/x
  3. Step 3: Cross multiply
    519,367.68x = 780,906.24 × 478,310.40
  4. Step 4: Simplify right side
    519,367.68x = 373,515,576,016.90
  5. Step 5: Solve for x
    x = 373,515,576,016.90/519,367.68
  6. Step 6: Final answer
    x = 719,173.70

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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.