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Finding the Fourth Proportional to 652,192.80, 978,289.20 and 561,991.20

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Solution

The fourth proportional to 652,192.80, 978,289.20 and 561,991.20 is: 842,986.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    652,192.80 : 978,289.20 = 561,991.20 : x
  2. Step 2: Convert to fraction form
    652,192.80/978,289.20 = 561,991.20/x
  3. Step 3: Cross multiply
    652,192.80x = 978,289.20 × 561,991.20
  4. Step 4: Simplify right side
    652,192.80x = 549,789,921,455.04
  5. Step 5: Solve for x
    x = 549,789,921,455.04/652,192.80
  6. Step 6: Final answer
    x = 842,986.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.