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Finding the Third Proportional to 1,211,643.75 and 1,900,868.63

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Solution

The third proportional to 1,211,643.75 and 1,900,868.63 is: 2,982,148.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,643.75 : 1,900,868.63 = 1,900,868.63 : x
  2. Step 2: Convert to fraction form
    1,211,643.75/1,900,868.63 = 1,900,868.63/x
  3. Step 3: Cross multiply
    1,211,643.75x = 1,900,868.63 × 1,900,868.63
  4. Step 4: Simplify right side
    1,211,643.75x = 3,613,301,529,509.39
  5. Step 5: Solve for x
    x = 3,613,301,529,509.39/1,211,643.75
  6. Step 6: Final answer
    x = 2,982,148.45

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.