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Finding the Fourth Proportional to 190,400.40, 285,600.60 and 120,416.40

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Solution

The fourth proportional to 190,400.40, 285,600.60 and 120,416.40 is: 180,624.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    190,400.40 : 285,600.60 = 120,416.40 : x
  2. Step 2: Convert to fraction form
    190,400.40/285,600.60 = 120,416.40/x
  3. Step 3: Cross multiply
    190,400.40x = 285,600.60 × 120,416.40
  4. Step 4: Simplify right side
    190,400.40x = 34,390,996,089.84
  5. Step 5: Solve for x
    x = 34,390,996,089.84/190,400.40
  6. Step 6: Final answer
    x = 180,624.60

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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.