Home / 685,428.58-945,926.40-379,538.81

Finding the Fourth Proportional to 685,428.58, 945,926.40 and 379,538.81

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Solution

The fourth proportional to 685,428.58, 945,926.40 and 379,538.81 is: 523,782.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,428.58 : 945,926.40 = 379,538.81 : x
  2. Step 2: Convert to fraction form
    685,428.58/945,926.40 = 379,538.81/x
  3. Step 3: Cross multiply
    685,428.58x = 945,926.40 × 379,538.81
  4. Step 4: Simplify right side
    685,428.58x = 359,015,785,765.28
  5. Step 5: Solve for x
    x = 359,015,785,765.28/685,428.58
  6. Step 6: Final answer
    x = 523,782.92

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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.