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Finding the Fourth Proportional to 1,988,946.88, 2,983,494.22 and 641,128.94

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Solution

The fourth proportional to 1,988,946.88, 2,983,494.22 and 641,128.94 is: 961,717.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988,946.88 : 2,983,494.22 = 641,128.94 : x
  2. Step 2: Convert to fraction form
    1,988,946.88/2,983,494.22 = 641,128.94/x
  3. Step 3: Cross multiply
    1,988,946.88x = 2,983,494.22 × 641,128.94
  4. Step 4: Simplify right side
    1,988,946.88x = 1,912,804,486,764.73
  5. Step 5: Solve for x
    x = 1,912,804,486,764.73/1,988,946.88
  6. Step 6: Final answer
    x = 961,717.23

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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.