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Finding the Fourth Proportional to 691,394.88, 954,090.72 and 389,608.32

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Solution

The fourth proportional to 691,394.88, 954,090.72 and 389,608.32 is: 537,640.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,394.88 : 954,090.72 = 389,608.32 : x
  2. Step 2: Convert to fraction form
    691,394.88/954,090.72 = 389,608.32/x
  3. Step 3: Cross multiply
    691,394.88x = 954,090.72 × 389,608.32
  4. Step 4: Simplify right side
    691,394.88x = 371,721,682,546.79
  5. Step 5: Solve for x
    x = 371,721,682,546.79/691,394.88
  6. Step 6: Final answer
    x = 537,640.20

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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.