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Finding the Fourth Proportional to 716,465.88, 988,722.89 and 394,169.07

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Solution

The fourth proportional to 716,465.88, 988,722.89 and 394,169.07 is: 543,953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,465.88 : 988,722.89 = 394,169.07 : x
  2. Step 2: Convert to fraction form
    716,465.88/988,722.89 = 394,169.07/x
  3. Step 3: Cross multiply
    716,465.88x = 988,722.89 × 394,169.07
  4. Step 4: Simplify right side
    716,465.88x = 389,723,982,039.01
  5. Step 5: Solve for x
    x = 389,723,982,039.01/716,465.88
  6. Step 6: Final answer
    x = 543,953.30

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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.