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Finding the Fourth Proportional to 561,308.81, 774,606.92 and 319,591.49

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Solution

The fourth proportional to 561,308.81, 774,606.92 and 319,591.49 is: 441,036.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,308.81 : 774,606.92 = 319,591.49 : x
  2. Step 2: Convert to fraction form
    561,308.81/774,606.92 = 319,591.49/x
  3. Step 3: Cross multiply
    561,308.81x = 774,606.92 × 319,591.49
  4. Step 4: Simplify right side
    561,308.81x = 247,557,774,256.12
  5. Step 5: Solve for x
    x = 247,557,774,256.12/561,308.81
  6. Step 6: Final answer
    x = 441,036.68

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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.