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Finding the Fourth Proportional to 539,990.70, 809,467.65 and 419,981.10

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Solution

The fourth proportional to 539,990.70, 809,467.65 and 419,981.10 is: 629,568.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,990.70 : 809,467.65 = 419,981.10 : x
  2. Step 2: Convert to fraction form
    539,990.70/809,467.65 = 419,981.10/x
  3. Step 3: Cross multiply
    539,990.70x = 809,467.65 × 419,981.10
  4. Step 4: Simplify right side
    539,990.70x = 339,961,114,061.42
  5. Step 5: Solve for x
    x = 339,961,114,061.42/539,990.70
  6. Step 6: Final answer
    x = 629,568.46

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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.