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Finding the Fourth Proportional to 716,433.05, 988,641.87 and 394,134.86

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Solution

The fourth proportional to 716,433.05, 988,641.87 and 394,134.86 is: 543,886.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,433.05 : 988,641.87 = 394,134.86 : x
  2. Step 2: Convert to fraction form
    716,433.05/988,641.87 = 394,134.86/x
  3. Step 3: Cross multiply
    716,433.05x = 988,641.87 × 394,134.86
  4. Step 4: Simplify right side
    716,433.05x = 389,658,218,601.37
  5. Step 5: Solve for x
    x = 389,658,218,601.37/716,433.05
  6. Step 6: Final answer
    x = 543,886.44

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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.