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Finding the Fourth Proportional to 714,662.65, 986,236.39 and 392,393.62

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Solution

The fourth proportional to 714,662.65, 986,236.39 and 392,393.62 is: 541,504.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,662.65 : 986,236.39 = 392,393.62 : x
  2. Step 2: Convert to fraction form
    714,662.65/986,236.39 = 392,393.62/x
  3. Step 3: Cross multiply
    714,662.65x = 986,236.39 × 392,393.62
  4. Step 4: Simplify right side
    714,662.65x = 386,992,863,423.54
  5. Step 5: Solve for x
    x = 386,992,863,423.54/714,662.65
  6. Step 6: Final answer
    x = 541,504.25

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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.