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Finding the Fourth Proportional to 711,898.11, 982,406.25 and 389,601.72

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Solution

The fourth proportional to 711,898.11, 982,406.25 and 389,601.72 is: 537,643.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,898.11 : 982,406.25 = 389,601.72 : x
  2. Step 2: Convert to fraction form
    711,898.11/982,406.25 = 389,601.72/x
  3. Step 3: Cross multiply
    711,898.11x = 982,406.25 × 389,601.72
  4. Step 4: Simplify right side
    711,898.11x = 382,747,164,738.75
  5. Step 5: Solve for x
    x = 382,747,164,738.75/711,898.11
  6. Step 6: Final answer
    x = 537,643.18

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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.