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Finding the Fourth Proportional to 715,953.27, 988,019.19 and 393,684.15

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Solution

The fourth proportional to 715,953.27, 988,019.19 and 393,684.15 is: 543,286.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,953.27 : 988,019.19 = 393,684.15 : x
  2. Step 2: Convert to fraction form
    715,953.27/988,019.19 = 393,684.15/x
  3. Step 3: Cross multiply
    715,953.27x = 988,019.19 × 393,684.15
  4. Step 4: Simplify right side
    715,953.27x = 388,967,494,998.84
  5. Step 5: Solve for x
    x = 388,967,494,998.84/715,953.27
  6. Step 6: Final answer
    x = 543,286.15

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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.