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Finding the Fourth Proportional to 561,828.05, 775,132.77 and 319,939.10

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Solution

The fourth proportional to 561,828.05, 775,132.77 and 319,939.10 is: 441,407.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,828.05 : 775,132.77 = 319,939.10 : x
  2. Step 2: Convert to fraction form
    561,828.05/775,132.77 = 319,939.10/x
  3. Step 3: Cross multiply
    561,828.05x = 775,132.77 × 319,939.10
  4. Step 4: Simplify right side
    561,828.05x = 247,995,276,938.64
  5. Step 5: Solve for x
    x = 247,995,276,938.64/561,828.05
  6. Step 6: Final answer
    x = 441,407.79

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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.