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Finding the Fourth Proportional to 716,453.46, 988,705.78 and 394,156.69

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Solution

The fourth proportional to 716,453.46, 988,705.78 and 394,156.69 is: 543,936.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,453.46 : 988,705.78 = 394,156.69 : x
  2. Step 2: Convert to fraction form
    716,453.46/988,705.78 = 394,156.69/x
  3. Step 3: Cross multiply
    716,453.46x = 988,705.78 × 394,156.69
  4. Step 4: Simplify right side
    716,453.46x = 389,704,994,171.51
  5. Step 5: Solve for x
    x = 389,704,994,171.51/716,453.46
  6. Step 6: Final answer
    x = 543,936.23

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Double scale
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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.