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Finding the Fourth Proportional to 539,107.20, 809,326.40 and 339,427.20

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Solution

The fourth proportional to 539,107.20, 809,326.40 and 339,427.20 is: 509,559.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,107.20 : 809,326.40 = 339,427.20 : x
  2. Step 2: Convert to fraction form
    539,107.20/809,326.40 = 339,427.20/x
  3. Step 3: Cross multiply
    539,107.20x = 809,326.40 × 339,427.20
  4. Step 4: Simplify right side
    539,107.20x = 274,707,393,838.08
  5. Step 5: Solve for x
    x = 274,707,393,838.08/539,107.20
  6. Step 6: Final answer
    x = 509,559.87

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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.