Home / 1,380,142.72-1,904,576.40-768,294.36

Finding the Fourth Proportional to 1,380,142.72, 1,904,576.40 and 768,294.36

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Solution

The fourth proportional to 1,380,142.72, 1,904,576.40 and 768,294.36 is: 1,060,234.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,142.72 : 1,904,576.40 = 768,294.36 : x
  2. Step 2: Convert to fraction form
    1,380,142.72/1,904,576.40 = 768,294.36/x
  3. Step 3: Cross multiply
    1,380,142.72x = 1,904,576.40 × 768,294.36
  4. Step 4: Simplify right side
    1,380,142.72x = 1,463,275,306,309.10
  5. Step 5: Solve for x
    x = 1,463,275,306,309.10/1,380,142.72
  6. Step 6: Final answer
    x = 1,060,234.78

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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.