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Finding the Fourth Proportional to 681,327.99, 940,253.93 and 390,992.67

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Solution

The fourth proportional to 681,327.99, 940,253.93 and 390,992.67 is: 539,582.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,327.99 : 940,253.93 = 390,992.67 : x
  2. Step 2: Convert to fraction form
    681,327.99/940,253.93 = 390,992.67/x
  3. Step 3: Cross multiply
    681,327.99x = 940,253.93 × 390,992.67
  4. Step 4: Simplify right side
    681,327.99x = 367,632,392,613.73
  5. Step 5: Solve for x
    x = 367,632,392,613.73/681,327.99
  6. Step 6: Final answer
    x = 539,582.11

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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.