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Finding the Fourth Proportional to 714,976.60, 986,673.54 and 392,690.56

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Solution

The fourth proportional to 714,976.60, 986,673.54 and 392,690.56 is: 541,916.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,976.60 : 986,673.54 = 392,690.56 : x
  2. Step 2: Convert to fraction form
    714,976.60/986,673.54 = 392,690.56/x
  3. Step 3: Cross multiply
    714,976.60x = 986,673.54 × 392,690.56
  4. Step 4: Simplify right side
    714,976.60x = 387,457,384,959.78
  5. Step 5: Solve for x
    x = 387,457,384,959.78/714,976.60
  6. Step 6: Final answer
    x = 541,916.18

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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.