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Finding the Fourth Proportional to 561,780.63, 775,257.21 and 307,131.75

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Solution

The fourth proportional to 561,780.63, 775,257.21 and 307,131.75 is: 423,841.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,780.63 : 775,257.21 = 307,131.75 : x
  2. Step 2: Convert to fraction form
    561,780.63/775,257.21 = 307,131.75/x
  3. Step 3: Cross multiply
    561,780.63x = 775,257.21 × 307,131.75
  4. Step 4: Simplify right side
    561,780.63x = 238,106,103,607.42
  5. Step 5: Solve for x
    x = 238,106,103,607.42/561,780.63
  6. Step 6: Final answer
    x = 423,841.78

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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.