Home / 643,911.80-965,997.30-539,454.20

Finding the Fourth Proportional to 643,911.80, 965,997.30 and 539,454.20

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Solution

The fourth proportional to 643,911.80, 965,997.30 and 539,454.20 is: 809,289.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,911.80 : 965,997.30 = 539,454.20 : x
  2. Step 2: Convert to fraction form
    643,911.80/965,997.30 = 539,454.20/x
  3. Step 3: Cross multiply
    643,911.80x = 965,997.30 × 539,454.20
  4. Step 4: Simplify right side
    643,911.80x = 521,111,300,673.66
  5. Step 5: Solve for x
    x = 521,111,300,673.66/643,911.80
  6. Step 6: Final answer
    x = 809,289.88

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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.