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Finding the Fourth Proportional to 720,561.06, 994,378.17 and 393,874.52

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Solution

The fourth proportional to 720,561.06, 994,378.17 and 393,874.52 is: 543,548.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,561.06 : 994,378.17 = 393,874.52 : x
  2. Step 2: Convert to fraction form
    720,561.06/994,378.17 = 393,874.52/x
  3. Step 3: Cross multiply
    720,561.06x = 994,378.17 × 393,874.52
  4. Step 4: Simplify right side
    720,561.06x = 391,660,224,407.23
  5. Step 5: Solve for x
    x = 391,660,224,407.23/720,561.06
  6. Step 6: Final answer
    x = 543,548.97

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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.