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Finding the Fourth Proportional to 720,568.65, 994,367.39 and 393,867

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Solution

The fourth proportional to 720,568.65, 994,367.39 and 393,867 is: 543,526.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,568.65 : 994,367.39 = 393,867 : x
  2. Step 2: Convert to fraction form
    720,568.65/994,367.39 = 393,867/x
  3. Step 3: Cross multiply
    720,568.65x = 994,367.39 × 393,867
  4. Step 4: Simplify right side
    720,568.65x = 391,648,498,827.80
  5. Step 5: Solve for x
    x = 391,648,498,827.80/720,568.65
  6. Step 6: Final answer
    x = 543,526.98

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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.