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Finding the Fourth Proportional to 1,668,821.65, 2,303,019.15 and 943,777.80

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Solution

The fourth proportional to 1,668,821.65, 2,303,019.15 and 943,777.80 is: 1,302,438.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,668,821.65 : 2,303,019.15 = 943,777.80 : x
  2. Step 2: Convert to fraction form
    1,668,821.65/2,303,019.15 = 943,777.80/x
  3. Step 3: Cross multiply
    1,668,821.65x = 2,303,019.15 × 943,777.80
  4. Step 4: Simplify right side
    1,668,821.65x = 2,173,538,346,744.87
  5. Step 5: Solve for x
    x = 2,173,538,346,744.87/1,668,821.65
  6. Step 6: Final answer
    x = 1,302,438.97

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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.