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Finding the Fourth Proportional to 620,628.44, 931,015.54 and 221,325.98

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Solution

The fourth proportional to 620,628.44, 931,015.54 and 221,325.98 is: 332,014.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,628.44 : 931,015.54 = 221,325.98 : x
  2. Step 2: Convert to fraction form
    620,628.44/931,015.54 = 221,325.98/x
  3. Step 3: Cross multiply
    620,628.44x = 931,015.54 × 221,325.98
  4. Step 4: Simplify right side
    620,628.44x = 206,057,926,785.73
  5. Step 5: Solve for x
    x = 206,057,926,785.73/620,628.44
  6. Step 6: Final answer
    x = 332,014.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.