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Finding the Fourth Proportional to 519,960.60, 779,940.90 and 145,983.60

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Solution

The fourth proportional to 519,960.60, 779,940.90 and 145,983.60 is: 218,975.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,960.60 : 779,940.90 = 145,983.60 : x
  2. Step 2: Convert to fraction form
    519,960.60/779,940.90 = 145,983.60/x
  3. Step 3: Cross multiply
    519,960.60x = 779,940.90 × 145,983.60
  4. Step 4: Simplify right side
    519,960.60x = 113,858,580,369.24
  5. Step 5: Solve for x
    x = 113,858,580,369.24/519,960.60
  6. Step 6: Final answer
    x = 218,975.40

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Double scale
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Similar ratio
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1.5x scale

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.