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Finding the Fourth Proportional to 716,356.85, 988,533.52 and 394,014.92

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Solution

The fourth proportional to 716,356.85, 988,533.52 and 394,014.92 is: 543,719.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,356.85 : 988,533.52 = 394,014.92 : x
  2. Step 2: Convert to fraction form
    716,356.85/988,533.52 = 394,014.92/x
  3. Step 3: Cross multiply
    716,356.85x = 988,533.52 × 394,014.92
  4. Step 4: Simplify right side
    716,356.85x = 389,496,949,872.41
  5. Step 5: Solve for x
    x = 389,496,949,872.41/716,356.85
  6. Step 6: Final answer
    x = 543,719.17

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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.