Home / 681,172.56-939,969.63-405,515.79

Finding the Fourth Proportional to 681,172.56, 939,969.63 and 405,515.79

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Solution

The fourth proportional to 681,172.56, 939,969.63 and 405,515.79 is: 559,582.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,172.56 : 939,969.63 = 405,515.79 : x
  2. Step 2: Convert to fraction form
    681,172.56/939,969.63 = 405,515.79/x
  3. Step 3: Cross multiply
    681,172.56x = 939,969.63 × 405,515.79
  4. Step 4: Simplify right side
    681,172.56x = 381,172,527,085.46
  5. Step 5: Solve for x
    x = 381,172,527,085.46/681,172.56
  6. Step 6: Final answer
    x = 559,582.92

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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.