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Finding the Fourth Proportional to 539,449.20, 809,400.60 and 289,839.60

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Solution

The fourth proportional to 539,449.20, 809,400.60 and 289,839.60 is: 434,881.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,449.20 : 809,400.60 = 289,839.60 : x
  2. Step 2: Convert to fraction form
    539,449.20/809,400.60 = 289,839.60/x
  3. Step 3: Cross multiply
    539,449.20x = 809,400.60 × 289,839.60
  4. Step 4: Simplify right side
    539,449.20x = 234,596,346,143.76
  5. Step 5: Solve for x
    x = 234,596,346,143.76/539,449.20
  6. Step 6: Final answer
    x = 434,881.26

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1.5x scale

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.