Home / 405,319.09-559,342.11-221,561.41

Finding the Fourth Proportional to 405,319.09, 559,342.11 and 221,561.41

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Solution

The fourth proportional to 405,319.09, 559,342.11 and 221,561.41 is: 305,755.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,319.09 : 559,342.11 = 221,561.41 : x
  2. Step 2: Convert to fraction form
    405,319.09/559,342.11 = 221,561.41/x
  3. Step 3: Cross multiply
    405,319.09x = 559,342.11 × 221,561.41
  4. Step 4: Simplify right side
    405,319.09x = 123,928,626,563.98
  5. Step 5: Solve for x
    x = 123,928,626,563.98/405,319.09
  6. Step 6: Final answer
    x = 305,755.71

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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.