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Finding the Fourth Proportional to 685,315.38, 945,603.99 and 443,564.40

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Solution

The fourth proportional to 685,315.38, 945,603.99 and 443,564.40 is: 612,033.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,315.38 : 945,603.99 = 443,564.40 : x
  2. Step 2: Convert to fraction form
    685,315.38/945,603.99 = 443,564.40/x
  3. Step 3: Cross multiply
    685,315.38x = 945,603.99 × 443,564.40
  4. Step 4: Simplify right side
    685,315.38x = 419,436,266,461.96
  5. Step 5: Solve for x
    x = 419,436,266,461.96/685,315.38
  6. Step 6: Final answer
    x = 612,033.93

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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.