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Finding the Fourth Proportional to 720,194.43, 993,856.65 and 393,500.43

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Solution

The fourth proportional to 720,194.43, 993,856.65 and 393,500.43 is: 543,024.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,194.43 : 993,856.65 = 393,500.43 : x
  2. Step 2: Convert to fraction form
    720,194.43/993,856.65 = 393,500.43/x
  3. Step 3: Cross multiply
    720,194.43x = 993,856.65 × 393,500.43
  4. Step 4: Simplify right side
    720,194.43x = 391,083,019,133.36
  5. Step 5: Solve for x
    x = 391,083,019,133.36/720,194.43
  6. Step 6: Final answer
    x = 543,024.22

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1.5x scale

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.