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Finding the Fourth Proportional to 399,002.70, 550,623.75 and 255,763.02

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Solution

The fourth proportional to 399,002.70, 550,623.75 and 255,763.02 is: 352,952.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,002.70 : 550,623.75 = 255,763.02 : x
  2. Step 2: Convert to fraction form
    399,002.70/550,623.75 = 255,763.02/x
  3. Step 3: Cross multiply
    399,002.70x = 550,623.75 × 255,763.02
  4. Step 4: Simplify right side
    399,002.70x = 140,829,193,183.73
  5. Step 5: Solve for x
    x = 140,829,193,183.73/399,002.70
  6. Step 6: Final answer
    x = 352,952.98

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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.