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Finding the Fourth Proportional to 679,057.38, 937,181.82 and 388,776.84

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Solution

The fourth proportional to 679,057.38, 937,181.82 and 388,776.84 is: 536,559.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,057.38 : 937,181.82 = 388,776.84 : x
  2. Step 2: Convert to fraction form
    679,057.38/937,181.82 = 388,776.84/x
  3. Step 3: Cross multiply
    679,057.38x = 937,181.82 × 388,776.84
  4. Step 4: Simplify right side
    679,057.38x = 364,354,586,485.05
  5. Step 5: Solve for x
    x = 364,354,586,485.05/679,057.38
  6. Step 6: Final answer
    x = 536,559.35

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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.