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Finding the Fourth Proportional to 427,389.44, 641,053.44 and 190,753.28

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Solution

The fourth proportional to 427,389.44, 641,053.44 and 190,753.28 is: 286,116.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,389.44 : 641,053.44 = 190,753.28 : x
  2. Step 2: Convert to fraction form
    427,389.44/641,053.44 = 190,753.28/x
  3. Step 3: Cross multiply
    427,389.44x = 641,053.44 × 190,753.28
  4. Step 4: Simplify right side
    427,389.44x = 122,283,046,335.28
  5. Step 5: Solve for x
    x = 122,283,046,335.28/427,389.44
  6. Step 6: Final answer
    x = 286,116.21

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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.