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Finding the Fourth Proportional to 986,772.03, 1,361,780.69 and 557,128.59

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Solution

The fourth proportional to 986,772.03, 1,361,780.69 and 557,128.59 is: 768,857.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,772.03 : 1,361,780.69 = 557,128.59 : x
  2. Step 2: Convert to fraction form
    986,772.03/1,361,780.69 = 557,128.59/x
  3. Step 3: Cross multiply
    986,772.03x = 1,361,780.69 × 557,128.59
  4. Step 4: Simplify right side
    986,772.03x = 758,686,952,923.28
  5. Step 5: Solve for x
    x = 758,686,952,923.28/986,772.03
  6. Step 6: Final answer
    x = 768,857.38

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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.