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Finding the Fourth Proportional to 289,136.80, 433,705.20 and 111,649.60

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Solution

The fourth proportional to 289,136.80, 433,705.20 and 111,649.60 is: 167,474.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,136.80 : 433,705.20 = 111,649.60 : x
  2. Step 2: Convert to fraction form
    289,136.80/433,705.20 = 111,649.60/x
  3. Step 3: Cross multiply
    289,136.80x = 433,705.20 × 111,649.60
  4. Step 4: Simplify right side
    289,136.80x = 48,423,012,097.92
  5. Step 5: Solve for x
    x = 48,423,012,097.92/289,136.80
  6. Step 6: Final answer
    x = 167,474.40

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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.