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Finding the Fourth Proportional to 691,744.62, 954,609.15 and 389,938.62

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Solution

The fourth proportional to 691,744.62, 954,609.15 and 389,938.62 is: 538,116.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,744.62 : 954,609.15 = 389,938.62 : x
  2. Step 2: Convert to fraction form
    691,744.62/954,609.15 = 389,938.62/x
  3. Step 3: Cross multiply
    691,744.62x = 954,609.15 × 389,938.62
  4. Step 4: Simplify right side
    691,744.62x = 372,238,974,590.37
  5. Step 5: Solve for x
    x = 372,238,974,590.37/691,744.62
  6. Step 6: Final answer
    x = 538,116.18

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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.