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Finding the Fourth Proportional to 665,880.46, 918,302.21 and 436,354.39

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Solution

The fourth proportional to 665,880.46, 918,302.21 and 436,354.39 is: 601,767.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,880.46 : 918,302.21 = 436,354.39 : x
  2. Step 2: Convert to fraction form
    665,880.46/918,302.21 = 436,354.39/x
  3. Step 3: Cross multiply
    665,880.46x = 918,302.21 × 436,354.39
  4. Step 4: Simplify right side
    665,880.46x = 400,705,198,571.68
  5. Step 5: Solve for x
    x = 400,705,198,571.68/665,880.46
  6. Step 6: Final answer
    x = 601,767.47

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.