Home / 858,706.20-1,288,059.30-219,008.70

Finding the Fourth Proportional to 858,706.20, 1,288,059.30 and 219,008.70

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Solution

The fourth proportional to 858,706.20, 1,288,059.30 and 219,008.70 is: 328,513.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,706.20 : 1,288,059.30 = 219,008.70 : x
  2. Step 2: Convert to fraction form
    858,706.20/1,288,059.30 = 219,008.70/x
  3. Step 3: Cross multiply
    858,706.20x = 1,288,059.30 × 219,008.70
  4. Step 4: Simplify right side
    858,706.20x = 282,096,192,815.91
  5. Step 5: Solve for x
    x = 282,096,192,815.91/858,706.20
  6. Step 6: Final answer
    x = 328,513.05

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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.