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Finding the Fourth Proportional to 618,779.70, 928,169.55 and 369,947.70

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Solution

The fourth proportional to 618,779.70, 928,169.55 and 369,947.70 is: 554,921.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,779.70 : 928,169.55 = 369,947.70 : x
  2. Step 2: Convert to fraction form
    618,779.70/928,169.55 = 369,947.70/x
  3. Step 3: Cross multiply
    618,779.70x = 928,169.55 × 369,947.70
  4. Step 4: Simplify right side
    618,779.70x = 343,374,190,232.54
  5. Step 5: Solve for x
    x = 343,374,190,232.54/618,779.70
  6. Step 6: Final answer
    x = 554,921.55

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Double scale
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Similar ratio
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1.5x scale

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.