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Finding the Fourth Proportional to 681,573.42, 940,590.23 and 391,209.89

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Solution

The fourth proportional to 681,573.42, 940,590.23 and 391,209.89 is: 539,880.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,573.42 : 940,590.23 = 391,209.89 : x
  2. Step 2: Convert to fraction form
    681,573.42/940,590.23 = 391,209.89/x
  3. Step 3: Cross multiply
    681,573.42x = 940,590.23 × 391,209.89
  4. Step 4: Simplify right side
    681,573.42x = 367,968,193,754.37
  5. Step 5: Solve for x
    x = 367,968,193,754.37/681,573.42
  6. Step 6: Final answer
    x = 539,880.49

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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.