Home / 728,623.96-1,005,499.11-406,334.42

Finding the Fourth Proportional to 728,623.96, 1,005,499.11 and 406,334.42

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Solution

The fourth proportional to 728,623.96, 1,005,499.11 and 406,334.42 is: 560,740.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,623.96 : 1,005,499.11 = 406,334.42 : x
  2. Step 2: Convert to fraction form
    728,623.96/1,005,499.11 = 406,334.42/x
  3. Step 3: Cross multiply
    728,623.96x = 1,005,499.11 × 406,334.42
  4. Step 4: Simplify right side
    728,623.96x = 408,568,897,672.37
  5. Step 5: Solve for x
    x = 408,568,897,672.37/728,623.96
  6. Step 6: Final answer
    x = 560,740.41

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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.