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Finding the Fourth Proportional to 680,779.56, 939,601.76 and 394,299.56

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Solution

The fourth proportional to 680,779.56, 939,601.76 and 394,299.56 is: 544,206.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,779.56 : 939,601.76 = 394,299.56 : x
  2. Step 2: Convert to fraction form
    680,779.56/939,601.76 = 394,299.56/x
  3. Step 3: Cross multiply
    680,779.56x = 939,601.76 × 394,299.56
  4. Step 4: Simplify right side
    680,779.56x = 370,484,560,543.23
  5. Step 5: Solve for x
    x = 370,484,560,543.23/680,779.56
  6. Step 6: Final answer
    x = 544,206.35

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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.