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Finding the Fourth Proportional to 561,651.37, 775,077.96 and 319,933.80

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Solution

The fourth proportional to 561,651.37, 775,077.96 and 319,933.80 is: 441,508.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,651.37 : 775,077.96 = 319,933.80 : x
  2. Step 2: Convert to fraction form
    561,651.37/775,077.96 = 319,933.80/x
  3. Step 3: Cross multiply
    561,651.37x = 775,077.96 × 319,933.80
  4. Step 4: Simplify right side
    561,651.37x = 247,973,638,238.80
  5. Step 5: Solve for x
    x = 247,973,638,238.80/561,651.37
  6. Step 6: Final answer
    x = 441,508.12

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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.