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Finding the Fourth Proportional to 714,971.64, 986,660.28 and 392,690.46

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Solution

The fourth proportional to 714,971.64, 986,660.28 and 392,690.46 is: 541,912.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,971.64 : 986,660.28 = 392,690.46 : x
  2. Step 2: Convert to fraction form
    714,971.64/986,660.28 = 392,690.46/x
  3. Step 3: Cross multiply
    714,971.64x = 986,660.28 × 392,690.46
  4. Step 4: Simplify right side
    714,971.64x = 387,452,079,216.93
  5. Step 5: Solve for x
    x = 387,452,079,216.93/714,971.64
  6. Step 6: Final answer
    x = 541,912.51

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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.