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Finding the Fourth Proportional to 621,999.09, 858,441.23 and 350,119.76

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Solution

The fourth proportional to 621,999.09, 858,441.23 and 350,119.76 is: 483,211.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,999.09 : 858,441.23 = 350,119.76 : x
  2. Step 2: Convert to fraction form
    621,999.09/858,441.23 = 350,119.76/x
  3. Step 3: Cross multiply
    621,999.09x = 858,441.23 × 350,119.76
  4. Step 4: Simplify right side
    621,999.09x = 300,557,231,378.90
  5. Step 5: Solve for x
    x = 300,557,231,378.90/621,999.09
  6. Step 6: Final answer
    x = 483,211.69

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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.