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Finding the Fourth Proportional to 711,660.88, 981,955.56 and 405,731.44

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Solution

The fourth proportional to 711,660.88, 981,955.56 and 405,731.44 is: 559,831.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,660.88 : 981,955.56 = 405,731.44 : x
  2. Step 2: Convert to fraction form
    711,660.88/981,955.56 = 405,731.44/x
  3. Step 3: Cross multiply
    711,660.88x = 981,955.56 × 405,731.44
  4. Step 4: Simplify right side
    711,660.88x = 398,410,243,374.81
  5. Step 5: Solve for x
    x = 398,410,243,374.81/711,660.88
  6. Step 6: Final answer
    x = 559,831.59

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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.