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Finding the Fourth Proportional to 485,782.20, 728,138.70 and 170,076.60

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Solution

The fourth proportional to 485,782.20, 728,138.70 and 170,076.60 is: 254,927.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,782.20 : 728,138.70 = 170,076.60 : x
  2. Step 2: Convert to fraction form
    485,782.20/728,138.70 = 170,076.60/x
  3. Step 3: Cross multiply
    485,782.20x = 728,138.70 × 170,076.60
  4. Step 4: Simplify right side
    485,782.20x = 123,839,354,424.42
  5. Step 5: Solve for x
    x = 123,839,354,424.42/485,782.20
  6. Step 6: Final answer
    x = 254,927.73

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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.