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Finding the Fourth Proportional to 680,601.80, 1,020,902.70 and 396,000.20

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Solution

The fourth proportional to 680,601.80, 1,020,902.70 and 396,000.20 is: 594,000.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,601.80 : 1,020,902.70 = 396,000.20 : x
  2. Step 2: Convert to fraction form
    680,601.80/1,020,902.70 = 396,000.20/x
  3. Step 3: Cross multiply
    680,601.80x = 1,020,902.70 × 396,000.20
  4. Step 4: Simplify right side
    680,601.80x = 404,277,673,380.54
  5. Step 5: Solve for x
    x = 404,277,673,380.54/680,601.80
  6. Step 6: Final answer
    x = 594,000.30

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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.