Home / 685,904.63-946,546.56-379,981.60

Finding the Fourth Proportional to 685,904.63, 946,546.56 and 379,981.60

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Solution

The fourth proportional to 685,904.63, 946,546.56 and 379,981.60 is: 524,373.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,904.63 : 946,546.56 = 379,981.60 : x
  2. Step 2: Convert to fraction form
    685,904.63/946,546.56 = 379,981.60/x
  3. Step 3: Cross multiply
    685,904.63x = 946,546.56 × 379,981.60
  4. Step 4: Simplify right side
    685,904.63x = 359,670,273,976.93
  5. Step 5: Solve for x
    x = 359,670,273,976.93/685,904.63
  6. Step 6: Final answer
    x = 524,373.59

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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.