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Finding the Fourth Proportional to 539,172.60, 809,342.10 and 339,718.20

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Solution

The fourth proportional to 539,172.60, 809,342.10 and 339,718.20 is: 509,944.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,172.60 : 809,342.10 = 339,718.20 : x
  2. Step 2: Convert to fraction form
    539,172.60/809,342.10 = 339,718.20/x
  3. Step 3: Cross multiply
    539,172.60x = 809,342.10 × 339,718.20
  4. Step 4: Simplify right side
    539,172.60x = 274,948,241,396.22
  5. Step 5: Solve for x
    x = 274,948,241,396.22/539,172.60
  6. Step 6: Final answer
    x = 509,944.76

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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.