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Finding the Fourth Proportional to 485,610.40, 728,490.58 and 165,687.28

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Solution

The fourth proportional to 485,610.40, 728,490.58 and 165,687.28 is: 248,556.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,610.40 : 728,490.58 = 165,687.28 : x
  2. Step 2: Convert to fraction form
    485,610.40/728,490.58 = 165,687.28/x
  3. Step 3: Cross multiply
    485,610.40x = 728,490.58 × 165,687.28
  4. Step 4: Simplify right side
    485,610.40x = 120,701,622,705.82
  5. Step 5: Solve for x
    x = 120,701,622,705.82/485,610.40
  6. Step 6: Final answer
    x = 248,556.50

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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.