Home / 289,783.20-434,091.60-201,136.80

Finding the Fourth Proportional to 289,783.20, 434,091.60 and 201,136.80

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Solution

The fourth proportional to 289,783.20, 434,091.60 and 201,136.80 is: 301,300.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,783.20 : 434,091.60 = 201,136.80 : x
  2. Step 2: Convert to fraction form
    289,783.20/434,091.60 = 201,136.80/x
  3. Step 3: Cross multiply
    289,783.20x = 434,091.60 × 201,136.80
  4. Step 4: Simplify right side
    289,783.20x = 87,311,795,330.88
  5. Step 5: Solve for x
    x = 87,311,795,330.88/289,783.20
  6. Step 6: Final answer
    x = 301,300.40

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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.