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Finding the Fourth Proportional to 539,386.40, 809,662.80 and 303,190.40

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Solution

The fourth proportional to 539,386.40, 809,662.80 and 303,190.40 is: 455,113.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,386.40 : 809,662.80 = 303,190.40 : x
  2. Step 2: Convert to fraction form
    539,386.40/809,662.80 = 303,190.40/x
  3. Step 3: Cross multiply
    539,386.40x = 809,662.80 × 303,190.40
  4. Step 4: Simplify right side
    539,386.40x = 245,481,988,197.12
  5. Step 5: Solve for x
    x = 245,481,988,197.12/539,386.40
  6. Step 6: Final answer
    x = 455,113.42

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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.