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Finding the Fourth Proportional to 716,380.86, 988,598.49 and 394,091.34

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Solution

The fourth proportional to 716,380.86, 988,598.49 and 394,091.34 is: 543,842.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,380.86 : 988,598.49 = 394,091.34 : x
  2. Step 2: Convert to fraction form
    716,380.86/988,598.49 = 394,091.34/x
  3. Step 3: Cross multiply
    716,380.86x = 988,598.49 × 394,091.34
  4. Step 4: Simplify right side
    716,380.86x = 389,598,103,646.08
  5. Step 5: Solve for x
    x = 389,598,103,646.08/716,380.86
  6. Step 6: Final answer
    x = 543,842.15

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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.