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Finding the Fourth Proportional to 714,812.76, 986,392.71 and 392,543.73

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Solution

The fourth proportional to 714,812.76, 986,392.71 and 392,543.73 is: 541,683.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,812.76 : 986,392.71 = 392,543.73 : x
  2. Step 2: Convert to fraction form
    714,812.76/986,392.71 = 392,543.73/x
  3. Step 3: Cross multiply
    714,812.76x = 986,392.71 × 392,543.73
  4. Step 4: Simplify right side
    714,812.76x = 387,202,273,628.21
  5. Step 5: Solve for x
    x = 387,202,273,628.21/714,812.76
  6. Step 6: Final answer
    x = 541,683.49

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Double scale
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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.