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Finding the Fourth Proportional to 519,878.40, 779,817.60 and 342,585.60

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Solution

The fourth proportional to 519,878.40, 779,817.60 and 342,585.60 is: 513,878.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,878.40 : 779,817.60 = 342,585.60 : x
  2. Step 2: Convert to fraction form
    519,878.40/779,817.60 = 342,585.60/x
  3. Step 3: Cross multiply
    519,878.40x = 779,817.60 × 342,585.60
  4. Step 4: Simplify right side
    519,878.40x = 267,154,280,386.56
  5. Step 5: Solve for x
    x = 267,154,280,386.56/519,878.40
  6. Step 6: Final answer
    x = 513,878.40

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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.