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Finding the Fourth Proportional to 485,611.60, 727,761.30 and 325,231.60

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Solution

The fourth proportional to 485,611.60, 727,761.30 and 325,231.60 is: 487,407.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,611.60 : 727,761.30 = 325,231.60 : x
  2. Step 2: Convert to fraction form
    485,611.60/727,761.30 = 325,231.60/x
  3. Step 3: Cross multiply
    485,611.60x = 727,761.30 × 325,231.60
  4. Step 4: Simplify right side
    485,611.60x = 236,690,972,017.08
  5. Step 5: Solve for x
    x = 236,690,972,017.08/485,611.60
  6. Step 6: Final answer
    x = 487,407.99

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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.