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Finding the Fourth Proportional to 685,228.42, 945,603.74 and 379,298.21

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Solution

The fourth proportional to 685,228.42, 945,603.74 and 379,298.21 is: 523,425.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,228.42 : 945,603.74 = 379,298.21 : x
  2. Step 2: Convert to fraction form
    685,228.42/945,603.74 = 379,298.21/x
  3. Step 3: Cross multiply
    685,228.42x = 945,603.74 × 379,298.21
  4. Step 4: Simplify right side
    685,228.42x = 358,665,809,263.56
  5. Step 5: Solve for x
    x = 358,665,809,263.56/685,228.42
  6. Step 6: Final answer
    x = 523,425.18

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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.