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Finding the Fourth Proportional to 647,231.20, 970,691.28 and 331,525.60

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Solution

The fourth proportional to 647,231.20, 970,691.28 and 331,525.60 is: 497,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,231.20 : 970,691.28 = 331,525.60 : x
  2. Step 2: Convert to fraction form
    647,231.20/970,691.28 = 331,525.60/x
  3. Step 3: Cross multiply
    647,231.20x = 970,691.28 × 331,525.60
  4. Step 4: Simplify right side
    647,231.20x = 321,809,009,016.77
  5. Step 5: Solve for x
    x = 321,809,009,016.77/647,231.20
  6. Step 6: Final answer
    x = 497,208.74

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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.