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Finding the Fourth Proportional to 676,438.72, 1,014,668 and 321,488.96

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Solution

The fourth proportional to 676,438.72, 1,014,668 and 321,488.96 is: 482,238.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,438.72 : 1,014,668 = 321,488.96 : x
  2. Step 2: Convert to fraction form
    676,438.72/1,014,668 = 321,488.96/x
  3. Step 3: Cross multiply
    676,438.72x = 1,014,668 × 321,488.96
  4. Step 4: Simplify right side
    676,438.72x = 326,204,560,065.28
  5. Step 5: Solve for x
    x = 326,204,560,065.28/676,438.72
  6. Step 6: Final answer
    x = 482,238.15

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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.