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Finding the Fourth Proportional to 668,303.46, 921,959.92 and 396,382.82

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Solution

The fourth proportional to 668,303.46, 921,959.92 and 396,382.82 is: 546,831.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,303.46 : 921,959.92 = 396,382.82 : x
  2. Step 2: Convert to fraction form
    668,303.46/921,959.92 = 396,382.82/x
  3. Step 3: Cross multiply
    668,303.46x = 921,959.92 × 396,382.82
  4. Step 4: Simplify right side
    668,303.46x = 365,449,068,902.25
  5. Step 5: Solve for x
    x = 365,449,068,902.25/668,303.46
  6. Step 6: Final answer
    x = 546,831.03

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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.