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Finding the Fourth Proportional to 711,873.22, 982,371.90 and 389,576.85

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Solution

The fourth proportional to 711,873.22, 982,371.90 and 389,576.85 is: 537,608.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,873.22 : 982,371.90 = 389,576.85 : x
  2. Step 2: Convert to fraction form
    711,873.22/982,371.90 = 389,576.85/x
  3. Step 3: Cross multiply
    711,873.22x = 982,371.90 × 389,576.85
  4. Step 4: Simplify right side
    711,873.22x = 382,709,345,418.66
  5. Step 5: Solve for x
    x = 382,709,345,418.66/711,873.22
  6. Step 6: Final answer
    x = 537,608.86

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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.