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Finding the Fourth Proportional to 399,339.64, 599,723.34 and 383,285.80

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Solution

The fourth proportional to 399,339.64, 599,723.34 and 383,285.80 is: 575,613.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,339.64 : 599,723.34 = 383,285.80 : x
  2. Step 2: Convert to fraction form
    399,339.64/599,723.34 = 383,285.80/x
  3. Step 3: Cross multiply
    399,339.64x = 599,723.34 × 383,285.80
  4. Step 4: Simplify right side
    399,339.64x = 229,865,440,150.57
  5. Step 5: Solve for x
    x = 229,865,440,150.57/399,339.64
  6. Step 6: Final answer
    x = 575,613.88

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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.