Home / 685,049.16-945,348.39-379,138.35

Finding the Fourth Proportional to 685,049.16, 945,348.39 and 379,138.35

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Solution

The fourth proportional to 685,049.16, 945,348.39 and 379,138.35 is: 523,200.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,049.16 : 945,348.39 = 379,138.35 : x
  2. Step 2: Convert to fraction form
    685,049.16/945,348.39 = 379,138.35/x
  3. Step 3: Cross multiply
    685,049.16x = 945,348.39 × 379,138.35
  4. Step 4: Simplify right side
    685,049.16x = 358,417,828,759.76
  5. Step 5: Solve for x
    x = 358,417,828,759.76/685,049.16
  6. Step 6: Final answer
    x = 523,200.16

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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.