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Finding the Fourth Proportional to 405,903.20, 610,021.20 and 354,581.60

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Solution

The fourth proportional to 405,903.20, 610,021.20 and 354,581.60 is: 532,891.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,903.20 : 610,021.20 = 354,581.60 : x
  2. Step 2: Convert to fraction form
    405,903.20/610,021.20 = 354,581.60/x
  3. Step 3: Cross multiply
    405,903.20x = 610,021.20 × 354,581.60
  4. Step 4: Simplify right side
    405,903.20x = 216,302,293,129.92
  5. Step 5: Solve for x
    x = 216,302,293,129.92/405,903.20
  6. Step 6: Final answer
    x = 532,891.32

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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.