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Finding the Fourth Proportional to 518,631.58, 777,503.61 and 199,012.80

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Solution

The fourth proportional to 518,631.58, 777,503.61 and 199,012.80 is: 298,348.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,631.58 : 777,503.61 = 199,012.80 : x
  2. Step 2: Convert to fraction form
    518,631.58/777,503.61 = 199,012.80/x
  3. Step 3: Cross multiply
    518,631.58x = 777,503.61 × 199,012.80
  4. Step 4: Simplify right side
    518,631.58x = 154,733,170,436.21
  5. Step 5: Solve for x
    x = 154,733,170,436.21/518,631.58
  6. Step 6: Final answer
    x = 298,348.92

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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.