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Finding the Fourth Proportional to 556,688.94, 768,149.10 and 311,661.06

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Solution

The fourth proportional to 556,688.94, 768,149.10 and 311,661.06 is: 430,046.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    556,688.94 : 768,149.10 = 311,661.06 : x
  2. Step 2: Convert to fraction form
    556,688.94/768,149.10 = 311,661.06/x
  3. Step 3: Cross multiply
    556,688.94x = 768,149.10 × 311,661.06
  4. Step 4: Simplify right side
    556,688.94x = 239,402,162,744.05
  5. Step 5: Solve for x
    x = 239,402,162,744.05/556,688.94
  6. Step 6: Final answer
    x = 430,046.56

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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.