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Finding the Fourth Proportional to 716,168.94, 988,313.49 and 393,900.90

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Solution

The fourth proportional to 716,168.94, 988,313.49 and 393,900.90 is: 543,583.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,168.94 : 988,313.49 = 393,900.90 : x
  2. Step 2: Convert to fraction form
    716,168.94/988,313.49 = 393,900.90/x
  3. Step 3: Cross multiply
    716,168.94x = 988,313.49 × 393,900.90
  4. Step 4: Simplify right side
    716,168.94x = 389,297,573,193.14
  5. Step 5: Solve for x
    x = 389,297,573,193.14/716,168.94
  6. Step 6: Final answer
    x = 543,583.44

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Double scale
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Similar ratio
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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.