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Finding the Fourth Proportional to 561,076.54, 774,290.57 and 319,374.67

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Solution

The fourth proportional to 561,076.54, 774,290.57 and 319,374.67 is: 440,739.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,076.54 : 774,290.57 = 319,374.67 : x
  2. Step 2: Convert to fraction form
    561,076.54/774,290.57 = 319,374.67/x
  3. Step 3: Cross multiply
    561,076.54x = 774,290.57 × 319,374.67
  4. Step 4: Simplify right side
    561,076.54x = 247,288,797,620.35
  5. Step 5: Solve for x
    x = 247,288,797,620.35/561,076.54
  6. Step 6: Final answer
    x = 440,739.87

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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.