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Finding the Fourth Proportional to 1,213,933.20, 1,696,357.20 and 1,213,933.20

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Solution

The fourth proportional to 1,213,933.20, 1,696,357.20 and 1,213,933.20 is: 1,696,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,933.20 : 1,696,357.20 = 1,213,933.20 : x
  2. Step 2: Convert to fraction form
    1,213,933.20/1,696,357.20 = 1,213,933.20/x
  3. Step 3: Cross multiply
    1,213,933.20x = 1,696,357.20 × 1,213,933.20
  4. Step 4: Simplify right side
    1,213,933.20x = 2,059,264,324,139.04
  5. Step 5: Solve for x
    x = 2,059,264,324,139.04/1,213,933.20
  6. Step 6: Final answer
    x = 1,696,357.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.