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Finding the Fourth Proportional to 711,898.90, 982,420.86 and 389,608.81

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Solution

The fourth proportional to 711,898.90, 982,420.86 and 389,608.81 is: 537,660.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,898.90 : 982,420.86 = 389,608.81 : x
  2. Step 2: Convert to fraction form
    711,898.90/982,420.86 = 389,608.81/x
  3. Step 3: Cross multiply
    711,898.90x = 982,420.86 × 389,608.81
  4. Step 4: Simplify right side
    711,898.90x = 382,759,822,183.78
  5. Step 5: Solve for x
    x = 382,759,822,183.78/711,898.90
  6. Step 6: Final answer
    x = 537,660.36

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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.