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Finding the Fourth Proportional to 1,191,743.93, 1,787,363.69 and 392,835.57

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Solution

The fourth proportional to 1,191,743.93, 1,787,363.69 and 392,835.57 is: 589,170.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,191,743.93 : 1,787,363.69 = 392,835.57 : x
  2. Step 2: Convert to fraction form
    1,191,743.93/1,787,363.69 = 392,835.57/x
  3. Step 3: Cross multiply
    1,191,743.93x = 1,787,363.69 × 392,835.57
  4. Step 4: Simplify right side
    1,191,743.93x = 702,140,031,994.28
  5. Step 5: Solve for x
    x = 702,140,031,994.28/1,191,743.93
  6. Step 6: Final answer
    x = 589,170.22

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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.