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Finding the Fourth Proportional to 561,311.08, 774,610.04 and 319,593.77

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Solution

The fourth proportional to 561,311.08, 774,610.04 and 319,593.77 is: 441,039.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,311.08 : 774,610.04 = 319,593.77 : x
  2. Step 2: Convert to fraction form
    561,311.08/774,610.04 = 319,593.77/x
  3. Step 3: Cross multiply
    561,311.08x = 774,610.04 × 319,593.77
  4. Step 4: Simplify right side
    561,311.08x = 247,560,540,996.46
  5. Step 5: Solve for x
    x = 247,560,540,996.46/561,311.08
  6. Step 6: Final answer
    x = 441,039.82

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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.