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Finding the Fourth Proportional to 539,425.60, 809,138.40 and 274,004.80

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Solution

The fourth proportional to 539,425.60, 809,138.40 and 274,004.80 is: 411,007.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,425.60 : 809,138.40 = 274,004.80 : x
  2. Step 2: Convert to fraction form
    539,425.60/809,138.40 = 274,004.80/x
  3. Step 3: Cross multiply
    539,425.60x = 809,138.40 × 274,004.80
  4. Step 4: Simplify right side
    539,425.60x = 221,707,805,464.32
  5. Step 5: Solve for x
    x = 221,707,805,464.32/539,425.60
  6. Step 6: Final answer
    x = 411,007.20

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Similar ratio
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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.