Home / 858,697.70-1,288,046.55-219,000.20

Finding the Fourth Proportional to 858,697.70, 1,288,046.55 and 219,000.20

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Solution

The fourth proportional to 858,697.70, 1,288,046.55 and 219,000.20 is: 328,500.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,697.70 : 1,288,046.55 = 219,000.20 : x
  2. Step 2: Convert to fraction form
    858,697.70/1,288,046.55 = 219,000.20/x
  3. Step 3: Cross multiply
    858,697.70x = 1,288,046.55 × 219,000.20
  4. Step 4: Simplify right side
    858,697.70x = 282,082,452,059.31
  5. Step 5: Solve for x
    x = 282,082,452,059.31/858,697.70
  6. Step 6: Final answer
    x = 328,500.30

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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.