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Finding the Fourth Proportional to 568,620.86, 784,728.81 and 310,521.83

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Solution

The fourth proportional to 568,620.86, 784,728.81 and 310,521.83 is: 428,537.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    568,620.86 : 784,728.81 = 310,521.83 : x
  2. Step 2: Convert to fraction form
    568,620.86/784,728.81 = 310,521.83/x
  3. Step 3: Cross multiply
    568,620.86x = 784,728.81 × 310,521.83
  4. Step 4: Simplify right side
    568,620.86x = 243,675,422,211.28
  5. Step 5: Solve for x
    x = 243,675,422,211.28/568,620.86
  6. Step 6: Final answer
    x = 428,537.61

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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.