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Finding the Fourth Proportional to 519,316.60, 778,974.90 and 435,335.80

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Solution

The fourth proportional to 519,316.60, 778,974.90 and 435,335.80 is: 653,003.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,316.60 : 778,974.90 = 435,335.80 : x
  2. Step 2: Convert to fraction form
    519,316.60/778,974.90 = 435,335.80/x
  3. Step 3: Cross multiply
    519,316.60x = 778,974.90 × 435,335.80
  4. Step 4: Simplify right side
    519,316.60x = 339,115,661,271.42
  5. Step 5: Solve for x
    x = 339,115,661,271.42/519,316.60
  6. Step 6: Final answer
    x = 653,003.70

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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.