Home / 809,321.40-1,213,982.10-389,417.40

Finding the Fourth Proportional to 809,321.40, 1,213,982.10 and 389,417.40

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Solution

The fourth proportional to 809,321.40, 1,213,982.10 and 389,417.40 is: 584,126.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,321.40 : 1,213,982.10 = 389,417.40 : x
  2. Step 2: Convert to fraction form
    809,321.40/1,213,982.10 = 389,417.40/x
  3. Step 3: Cross multiply
    809,321.40x = 1,213,982.10 × 389,417.40
  4. Step 4: Simplify right side
    809,321.40x = 472,745,753,028.54
  5. Step 5: Solve for x
    x = 472,745,753,028.54/809,321.40
  6. Step 6: Final answer
    x = 584,126.10

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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.