Home / 685,921.92-946,570.40-379,998.88

Finding the Fourth Proportional to 685,921.92, 946,570.40 and 379,998.88

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Solution

The fourth proportional to 685,921.92, 946,570.40 and 379,998.88 is: 524,397.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,921.92 : 946,570.40 = 379,998.88 : x
  2. Step 2: Convert to fraction form
    685,921.92/946,570.40 = 379,998.88/x
  3. Step 3: Cross multiply
    685,921.92x = 946,570.40 × 379,998.88
  4. Step 4: Simplify right side
    685,921.92x = 359,695,691,841.15
  5. Step 5: Solve for x
    x = 359,695,691,841.15/685,921.92
  6. Step 6: Final answer
    x = 524,397.43

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Double scale
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Similar ratio
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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.