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Finding the Fourth Proportional to 711,124.60, 981,352.86 and 405,187.60

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Solution

The fourth proportional to 711,124.60, 981,352.86 and 405,187.60 is: 559,159.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,124.60 : 981,352.86 = 405,187.60 : x
  2. Step 2: Convert to fraction form
    711,124.60/981,352.86 = 405,187.60/x
  3. Step 3: Cross multiply
    711,124.60x = 981,352.86 × 405,187.60
  4. Step 4: Simplify right side
    711,124.60x = 397,632,010,096.54
  5. Step 5: Solve for x
    x = 397,632,010,096.54/711,124.60
  6. Step 6: Final answer
    x = 559,159.41

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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.