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Finding the Fourth Proportional to 6,642,767.70, 9,964,151.55 and 2,155,043.70

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Solution

The fourth proportional to 6,642,767.70, 9,964,151.55 and 2,155,043.70 is: 3,232,565.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,642,767.70 : 9,964,151.55 = 2,155,043.70 : x
  2. Step 2: Convert to fraction form
    6,642,767.70/9,964,151.55 = 2,155,043.70/x
  3. Step 3: Cross multiply
    6,642,767.70x = 9,964,151.55 × 2,155,043.70
  4. Step 4: Simplify right side
    6,642,767.70x = 21,473,182,023,672.74
  5. Step 5: Solve for x
    x = 21,473,182,023,672.74/6,642,767.70
  6. Step 6: Final answer
    x = 3,232,565.55

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Double scale
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Similar ratio
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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.