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Finding the Fourth Proportional to 871,995.70, 1,203,421.46 and 523,149.17

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Solution

The fourth proportional to 871,995.70, 1,203,421.46 and 523,149.17 is: 721,986.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,995.70 : 1,203,421.46 = 523,149.17 : x
  2. Step 2: Convert to fraction form
    871,995.70/1,203,421.46 = 523,149.17/x
  3. Step 3: Cross multiply
    871,995.70x = 1,203,421.46 × 523,149.17
  4. Step 4: Simplify right side
    871,995.70x = 629,568,929,326.34
  5. Step 5: Solve for x
    x = 629,568,929,326.34/871,995.70
  6. Step 6: Final answer
    x = 721,986.28

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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.