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Finding the Fourth Proportional to 1,287,928.24, 1,777,251.90 and 714,923.30

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Solution

The fourth proportional to 1,287,928.24, 1,777,251.90 and 714,923.30 is: 986,544.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,928.24 : 1,777,251.90 = 714,923.30 : x
  2. Step 2: Convert to fraction form
    1,287,928.24/1,777,251.90 = 714,923.30/x
  3. Step 3: Cross multiply
    1,287,928.24x = 1,777,251.90 × 714,923.30
  4. Step 4: Simplify right side
    1,287,928.24x = 1,270,598,793,279.27
  5. Step 5: Solve for x
    x = 1,270,598,793,279.27/1,287,928.24
  6. Step 6: Final answer
    x = 986,544.71

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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.