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Finding the Fourth Proportional to 685,023.64, 945,522.78 and 398,599.24

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Solution

The fourth proportional to 685,023.64, 945,522.78 and 398,599.24 is: 550,177.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,023.64 : 945,522.78 = 398,599.24 : x
  2. Step 2: Convert to fraction form
    685,023.64/945,522.78 = 398,599.24/x
  3. Step 3: Cross multiply
    685,023.64x = 945,522.78 × 398,599.24
  4. Step 4: Simplify right side
    685,023.64x = 376,884,661,510.69
  5. Step 5: Solve for x
    x = 376,884,661,510.69/685,023.64
  6. Step 6: Final answer
    x = 550,177.60

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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.