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Finding the Fourth Proportional to 519,520.40, 779,280.60 and 342,227.60

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Solution

The fourth proportional to 519,520.40, 779,280.60 and 342,227.60 is: 513,341.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,520.40 : 779,280.60 = 342,227.60 : x
  2. Step 2: Convert to fraction form
    519,520.40/779,280.60 = 342,227.60/x
  3. Step 3: Cross multiply
    519,520.40x = 779,280.60 × 342,227.60
  4. Step 4: Simplify right side
    519,520.40x = 266,691,329,464.56
  5. Step 5: Solve for x
    x = 266,691,329,464.56/519,520.40
  6. Step 6: Final answer
    x = 513,341.40

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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.