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Finding the Fourth Proportional to 539,383.20, 809,740.40 and 339,703.20

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Solution

The fourth proportional to 539,383.20, 809,740.40 and 339,703.20 is: 509,973.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,383.20 : 809,740.40 = 339,703.20 : x
  2. Step 2: Convert to fraction form
    539,383.20/809,740.40 = 339,703.20/x
  3. Step 3: Cross multiply
    539,383.20x = 809,740.40 × 339,703.20
  4. Step 4: Simplify right side
    539,383.20x = 275,071,405,049.28
  5. Step 5: Solve for x
    x = 275,071,405,049.28/539,383.20
  6. Step 6: Final answer
    x = 509,973.99

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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.