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Finding the Fourth Proportional to 289,600.20, 434,400.30 and 240,611.40

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Solution

The fourth proportional to 289,600.20, 434,400.30 and 240,611.40 is: 360,917.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,600.20 : 434,400.30 = 240,611.40 : x
  2. Step 2: Convert to fraction form
    289,600.20/434,400.30 = 240,611.40/x
  3. Step 3: Cross multiply
    289,600.20x = 434,400.30 × 240,611.40
  4. Step 4: Simplify right side
    289,600.20x = 104,521,664,343.42
  5. Step 5: Solve for x
    x = 104,521,664,343.42/289,600.20
  6. Step 6: Final answer
    x = 360,917.10

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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.