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Finding the Fourth Proportional to 539,993.80, 809,990.70 and 511,125.40

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Solution

The fourth proportional to 539,993.80, 809,990.70 and 511,125.40 is: 766,688.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,993.80 : 809,990.70 = 511,125.40 : x
  2. Step 2: Convert to fraction form
    539,993.80/809,990.70 = 511,125.40/x
  3. Step 3: Cross multiply
    539,993.80x = 809,990.70 × 511,125.40
  4. Step 4: Simplify right side
    539,993.80x = 414,006,820,533.78
  5. Step 5: Solve for x
    x = 414,006,820,533.78/539,993.80
  6. Step 6: Final answer
    x = 766,688.10

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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.