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Finding the Fourth Proportional to 289,708.80, 434,563.20 and 273,379.20

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Solution

The fourth proportional to 289,708.80, 434,563.20 and 273,379.20 is: 410,068.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,708.80 : 434,563.20 = 273,379.20 : x
  2. Step 2: Convert to fraction form
    289,708.80/434,563.20 = 273,379.20/x
  3. Step 3: Cross multiply
    289,708.80x = 434,563.20 × 273,379.20
  4. Step 4: Simplify right side
    289,708.80x = 118,800,539,965.44
  5. Step 5: Solve for x
    x = 118,800,539,965.44/289,708.80
  6. Step 6: Final answer
    x = 410,068.80

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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.