Home / 815,664.86-1,221,633.64-389,499.19

Finding the Fourth Proportional to 815,664.86, 1,221,633.64 and 389,499.19

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Solution

The fourth proportional to 815,664.86, 1,221,633.64 and 389,499.19 is: 583,358.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    815,664.86 : 1,221,633.64 = 389,499.19 : x
  2. Step 2: Convert to fraction form
    815,664.86/1,221,633.64 = 389,499.19/x
  3. Step 3: Cross multiply
    815,664.86x = 1,221,633.64 × 389,499.19
  4. Step 4: Simplify right side
    815,664.86x = 475,825,313,256.75
  5. Step 5: Solve for x
    x = 475,825,313,256.75/815,664.86
  6. Step 6: Final answer
    x = 583,358.85

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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.