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Finding the Fourth Proportional to 623,716.20, 936,011.70 and 399,621.60

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Solution

The fourth proportional to 623,716.20, 936,011.70 and 399,621.60 is: 599,712.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,716.20 : 936,011.70 = 399,621.60 : x
  2. Step 2: Convert to fraction form
    623,716.20/936,011.70 = 399,621.60/x
  3. Step 3: Cross multiply
    623,716.20x = 936,011.70 × 399,621.60
  4. Step 4: Simplify right side
    623,716.20x = 374,050,493,172.72
  5. Step 5: Solve for x
    x = 374,050,493,172.72/623,716.20
  6. Step 6: Final answer
    x = 599,712.65

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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.