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Finding the Fourth Proportional to 716,387.01, 988,582.89 and 394,076.67

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Solution

The fourth proportional to 716,387.01, 988,582.89 and 394,076.67 is: 543,808.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,387.01 : 988,582.89 = 394,076.67 : x
  2. Step 2: Convert to fraction form
    716,387.01/988,582.89 = 394,076.67/x
  3. Step 3: Cross multiply
    716,387.01x = 988,582.89 × 394,076.67
  4. Step 4: Simplify right side
    716,387.01x = 389,577,453,310.18
  5. Step 5: Solve for x
    x = 389,577,453,310.18/716,387.01
  6. Step 6: Final answer
    x = 543,808.65

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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.