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Finding the Fourth Proportional to 542,997.80, 748,648.14 and 388,134.44

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Solution

The fourth proportional to 542,997.80, 748,648.14 and 388,134.44 is: 535,133.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,997.80 : 748,648.14 = 388,134.44 : x
  2. Step 2: Convert to fraction form
    542,997.80/748,648.14 = 388,134.44/x
  3. Step 3: Cross multiply
    542,997.80x = 748,648.14 × 388,134.44
  4. Step 4: Simplify right side
    542,997.80x = 290,576,126,575.94
  5. Step 5: Solve for x
    x = 290,576,126,575.94/542,997.80
  6. Step 6: Final answer
    x = 535,133.16

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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.