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Finding the Fourth Proportional to 7,319,039.40, 10,978,559.10 and 2,000,255.40

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Solution

The fourth proportional to 7,319,039.40, 10,978,559.10 and 2,000,255.40 is: 3,000,383.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,319,039.40 : 10,978,559.10 = 2,000,255.40 : x
  2. Step 2: Convert to fraction form
    7,319,039.40/10,978,559.10 = 2,000,255.40/x
  3. Step 3: Cross multiply
    7,319,039.40x = 10,978,559.10 × 2,000,255.40
  4. Step 4: Simplify right side
    7,319,039.40x = 21,959,922,123,994.14
  5. Step 5: Solve for x
    x = 21,959,922,123,994.14/7,319,039.40
  6. Step 6: Final answer
    x = 3,000,383.10

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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.