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Finding the Fourth Proportional to 639,871.20, 960,001.20 and 359,200.80

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Solution

The fourth proportional to 639,871.20, 960,001.20 and 359,200.80 is: 538,910.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,871.20 : 960,001.20 = 359,200.80 : x
  2. Step 2: Convert to fraction form
    639,871.20/960,001.20 = 359,200.80/x
  3. Step 3: Cross multiply
    639,871.20x = 960,001.20 × 359,200.80
  4. Step 4: Simplify right side
    639,871.20x = 344,833,199,040.96
  5. Step 5: Solve for x
    x = 344,833,199,040.96/639,871.20
  6. Step 6: Final answer
    x = 538,910.33

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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.