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Finding the Fourth Proportional to 5,709,776.74, 7,879,990.21 and 3,131,955.74

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Solution

The fourth proportional to 5,709,776.74, 7,879,990.21 and 3,131,955.74 is: 4,322,372.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,709,776.74 : 7,879,990.21 = 3,131,955.74 : x
  2. Step 2: Convert to fraction form
    5,709,776.74/7,879,990.21 = 3,131,955.74/x
  3. Step 3: Cross multiply
    5,709,776.74x = 7,879,990.21 × 3,131,955.74
  4. Step 4: Simplify right side
    5,709,776.74x = 24,679,780,514,293.57
  5. Step 5: Solve for x
    x = 24,679,780,514,293.57/5,709,776.74
  6. Step 6: Final answer
    x = 4,322,372.25

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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.