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Finding the Fourth Proportional to 539,109.20, 809,329.40 and 339,429.20

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Solution

The fourth proportional to 539,109.20, 809,329.40 and 339,429.20 is: 509,562.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,109.20 : 809,329.40 = 339,429.20 : x
  2. Step 2: Convert to fraction form
    539,109.20/809,329.40 = 339,429.20/x
  3. Step 3: Cross multiply
    539,109.20x = 809,329.40 × 339,429.20
  4. Step 4: Simplify right side
    539,109.20x = 274,710,030,778.48
  5. Step 5: Solve for x
    x = 274,710,030,778.48/539,109.20
  6. Step 6: Final answer
    x = 509,562.87

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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.