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Finding the Fourth Proportional to 665,880.97, 918,302.91 and 436,354.89

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Solution

The fourth proportional to 665,880.97, 918,302.91 and 436,354.89 is: 601,768.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,880.97 : 918,302.91 = 436,354.89 : x
  2. Step 2: Convert to fraction form
    665,880.97/918,302.91 = 436,354.89/x
  3. Step 3: Cross multiply
    665,880.97x = 918,302.91 × 436,354.89
  4. Step 4: Simplify right side
    665,880.97x = 400,705,958,506.44
  5. Step 5: Solve for x
    x = 400,705,958,506.44/665,880.97
  6. Step 6: Final answer
    x = 601,768.15

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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.