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Finding the Fourth Proportional to 683,886, 943,737.12 and 393,542.40

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Solution

The fourth proportional to 683,886, 943,737.12 and 393,542.40 is: 543,073.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    683,886 : 943,737.12 = 393,542.40 : x
  2. Step 2: Convert to fraction form
    683,886/943,737.12 = 393,542.40/x
  3. Step 3: Cross multiply
    683,886x = 943,737.12 × 393,542.40
  4. Step 4: Simplify right side
    683,886x = 371,400,571,173.89
  5. Step 5: Solve for x
    x = 371,400,571,173.89/683,886
  6. Step 6: Final answer
    x = 543,073.80

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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.