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Finding the Fourth Proportional to 539,429.20, 809,370.60 and 289,819.60

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Solution

The fourth proportional to 539,429.20, 809,370.60 and 289,819.60 is: 434,851.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,429.20 : 809,370.60 = 289,819.60 : x
  2. Step 2: Convert to fraction form
    539,429.20/809,370.60 = 289,819.60/x
  3. Step 3: Cross multiply
    539,429.20x = 809,370.60 × 289,819.60
  4. Step 4: Simplify right side
    539,429.20x = 234,571,463,543.76
  5. Step 5: Solve for x
    x = 234,571,463,543.76/539,429.20
  6. Step 6: Final answer
    x = 434,851.25

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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.