Home / 643,838.42-888,538.61-371,917.78

Finding the Fourth Proportional to 643,838.42, 888,538.61 and 371,917.78

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Solution

The fourth proportional to 643,838.42, 888,538.61 and 371,917.78 is: 513,270.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,838.42 : 888,538.61 = 371,917.78 : x
  2. Step 2: Convert to fraction form
    643,838.42/888,538.61 = 371,917.78/x
  3. Step 3: Cross multiply
    643,838.42x = 888,538.61 × 371,917.78
  4. Step 4: Simplify right side
    643,838.42x = 330,463,305,983.93
  5. Step 5: Solve for x
    x = 330,463,305,983.93/643,838.42
  6. Step 6: Final answer
    x = 513,270.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.