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Finding the Fourth Proportional to 547,696.80, 821,545.20 and 193,111.20

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Solution

The fourth proportional to 547,696.80, 821,545.20 and 193,111.20 is: 289,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,696.80 : 821,545.20 = 193,111.20 : x
  2. Step 2: Convert to fraction form
    547,696.80/821,545.20 = 193,111.20/x
  3. Step 3: Cross multiply
    547,696.80x = 821,545.20 × 193,111.20
  4. Step 4: Simplify right side
    547,696.80x = 158,649,579,426.24
  5. Step 5: Solve for x
    x = 158,649,579,426.24/547,696.80
  6. Step 6: Final answer
    x = 289,666.80

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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.