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Finding the Fourth Proportional to 699,888.72, 965,864.50 and 393,976.05

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Solution

The fourth proportional to 699,888.72, 965,864.50 and 393,976.05 is: 543,697.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,888.72 : 965,864.50 = 393,976.05 : x
  2. Step 2: Convert to fraction form
    699,888.72/965,864.50 = 393,976.05/x
  3. Step 3: Cross multiply
    699,888.72x = 965,864.50 × 393,976.05
  4. Step 4: Simplify right side
    699,888.72x = 380,527,483,011.21
  5. Step 5: Solve for x
    x = 380,527,483,011.21/699,888.72
  6. Step 6: Final answer
    x = 543,697.12

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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.