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Finding the Fourth Proportional to 662,519.70, 993,779.55 and 219,287.70

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Solution

The fourth proportional to 662,519.70, 993,779.55 and 219,287.70 is: 328,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,519.70 : 993,779.55 = 219,287.70 : x
  2. Step 2: Convert to fraction form
    662,519.70/993,779.55 = 219,287.70/x
  3. Step 3: Cross multiply
    662,519.70x = 993,779.55 × 219,287.70
  4. Step 4: Simplify right side
    662,519.70x = 217,923,631,826.54
  5. Step 5: Solve for x
    x = 217,923,631,826.54/662,519.70
  6. Step 6: Final answer
    x = 328,931.55

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Half scale
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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.