Home / 1,390,469.51-2,085,179.37-641,990.63

Finding the Fourth Proportional to 1,390,469.51, 2,085,179.37 and 641,990.63

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Solution

The fourth proportional to 1,390,469.51, 2,085,179.37 and 641,990.63 is: 962,743.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,469.51 : 2,085,179.37 = 641,990.63 : x
  2. Step 2: Convert to fraction form
    1,390,469.51/2,085,179.37 = 641,990.63/x
  3. Step 3: Cross multiply
    1,390,469.51x = 2,085,179.37 × 641,990.63
  4. Step 4: Simplify right side
    1,390,469.51x = 1,338,665,606,983.41
  5. Step 5: Solve for x
    x = 1,338,665,606,983.41/1,390,469.51
  6. Step 6: Final answer
    x = 962,743.59

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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.