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Finding the Fourth Proportional to 1,939,745.13, 2,909,615.90 and 914,836.28

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Solution

The fourth proportional to 1,939,745.13, 2,909,615.90 and 914,836.28 is: 1,372,253.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939,745.13 : 2,909,615.90 = 914,836.28 : x
  2. Step 2: Convert to fraction form
    1,939,745.13/2,909,615.90 = 914,836.28/x
  3. Step 3: Cross multiply
    1,939,745.13x = 2,909,615.90 × 914,836.28
  4. Step 4: Simplify right side
    1,939,745.13x = 2,661,822,186,761.49
  5. Step 5: Solve for x
    x = 2,661,822,186,761.49/1,939,745.13
  6. Step 6: Final answer
    x = 1,372,253.58

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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.