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Finding the Fourth Proportional to 539,813.80, 809,739.90 and 165,836.20

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Solution

The fourth proportional to 539,813.80, 809,739.90 and 165,836.20 is: 248,760.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,813.80 : 809,739.90 = 165,836.20 : x
  2. Step 2: Convert to fraction form
    539,813.80/809,739.90 = 165,836.20/x
  3. Step 3: Cross multiply
    539,813.80x = 809,739.90 × 165,836.20
  4. Step 4: Simplify right side
    539,813.80x = 134,284,188,004.38
  5. Step 5: Solve for x
    x = 134,284,188,004.38/539,813.80
  6. Step 6: Final answer
    x = 248,760.20

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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.