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Finding the Fourth Proportional to 691,074.44, 953,661.30 and 389,261.96

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Solution

The fourth proportional to 691,074.44, 953,661.30 and 389,261.96 is: 537,169.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,074.44 : 953,661.30 = 389,261.96 : x
  2. Step 2: Convert to fraction form
    691,074.44/953,661.30 = 389,261.96/x
  3. Step 3: Cross multiply
    691,074.44x = 953,661.30 × 389,261.96
  4. Step 4: Simplify right side
    691,074.44x = 371,224,066,814.15
  5. Step 5: Solve for x
    x = 371,224,066,814.15/691,074.44
  6. Step 6: Final answer
    x = 537,169.44

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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.