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Finding the Fourth Proportional to 697,661.75, 962,760.96 and 391,740.55

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Solution

The fourth proportional to 697,661.75, 962,760.96 and 391,740.55 is: 540,595.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    697,661.75 : 962,760.96 = 391,740.55 : x
  2. Step 2: Convert to fraction form
    697,661.75/962,760.96 = 391,740.55/x
  3. Step 3: Cross multiply
    697,661.75x = 962,760.96 × 391,740.55
  4. Step 4: Simplify right side
    697,661.75x = 377,152,505,582.03
  5. Step 5: Solve for x
    x = 377,152,505,582.03/697,661.75
  6. Step 6: Final answer
    x = 540,595.07

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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.