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Finding the Fourth Proportional to 561,829.30, 775,134.50 and 319,940.35

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Solution

The fourth proportional to 561,829.30, 775,134.50 and 319,940.35 is: 441,409.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,829.30 : 775,134.50 = 319,940.35 : x
  2. Step 2: Convert to fraction form
    561,829.30/775,134.50 = 319,940.35/x
  3. Step 3: Cross multiply
    561,829.30x = 775,134.50 × 319,940.35
  4. Step 4: Simplify right side
    561,829.30x = 247,996,797,751.70
  5. Step 5: Solve for x
    x = 247,996,797,751.70/561,829.30
  6. Step 6: Final answer
    x = 441,409.52

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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.