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Finding the Fourth Proportional to 1,696,288.15, 2,340,895.78 and 921,919.11

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Solution

The fourth proportional to 1,696,288.15, 2,340,895.78 and 921,919.11 is: 1,272,258.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,696,288.15 : 2,340,895.78 = 921,919.11 : x
  2. Step 2: Convert to fraction form
    1,696,288.15/2,340,895.78 = 921,919.11/x
  3. Step 3: Cross multiply
    1,696,288.15x = 2,340,895.78 × 921,919.11
  4. Step 4: Simplify right side
    1,696,288.15x = 2,158,116,554,100.36
  5. Step 5: Solve for x
    x = 2,158,116,554,100.36/1,696,288.15
  6. Step 6: Final answer
    x = 1,272,258.23

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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.