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Finding the Fourth Proportional to 305,416.70, 459,109.20 and 217,280.60

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Solution

The fourth proportional to 305,416.70, 459,109.20 and 217,280.60 is: 326,621.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,416.70 : 459,109.20 = 217,280.60 : x
  2. Step 2: Convert to fraction form
    305,416.70/459,109.20 = 217,280.60/x
  3. Step 3: Cross multiply
    305,416.70x = 459,109.20 × 217,280.60
  4. Step 4: Simplify right side
    305,416.70x = 99,755,522,441.52
  5. Step 5: Solve for x
    x = 99,755,522,441.52/305,416.70
  6. Step 6: Final answer
    x = 326,621.05

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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.