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Finding the Fourth Proportional to 7,216,449.72, 9,958,712.62 and 3,953,193.30

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Solution

The fourth proportional to 7,216,449.72, 9,958,712.62 and 3,953,193.30 is: 5,455,413.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,216,449.72 : 9,958,712.62 = 3,953,193.30 : x
  2. Step 2: Convert to fraction form
    7,216,449.72/9,958,712.62 = 3,953,193.30/x
  3. Step 3: Cross multiply
    7,216,449.72x = 9,958,712.62 × 3,953,193.30
  4. Step 4: Simplify right side
    7,216,449.72x = 39,368,716,006,009.44
  5. Step 5: Solve for x
    x = 39,368,716,006,009.44/7,216,449.72
  6. Step 6: Final answer
    x = 5,455,413.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.