Home / 815,468.45-1,222,662.78-389,070.09

Finding the Fourth Proportional to 815,468.45, 1,222,662.78 and 389,070.09

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Solution

The fourth proportional to 815,468.45, 1,222,662.78 and 389,070.09 is: 583,347.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,468.45 : 1,222,662.78 = 389,070.09 : x
  2. Step 2: Convert to fraction form
    815,468.45/1,222,662.78 = 389,070.09/x
  3. Step 3: Cross multiply
    815,468.45x = 1,222,662.78 × 389,070.09
  4. Step 4: Simplify right side
    815,468.45x = 475,701,517,854.25
  5. Step 5: Solve for x
    x = 475,701,517,854.25/815,468.45
  6. Step 6: Final answer
    x = 583,347.55

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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.