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Finding the Fourth Proportional to 485,404.92, 728,435.40 and 169,864.56

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Solution

The fourth proportional to 485,404.92, 728,435.40 and 169,864.56 is: 254,911.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,404.92 : 728,435.40 = 169,864.56 : x
  2. Step 2: Convert to fraction form
    485,404.92/728,435.40 = 169,864.56/x
  3. Step 3: Cross multiply
    485,404.92x = 728,435.40 × 169,864.56
  4. Step 4: Simplify right side
    485,404.92x = 123,735,358,709.42
  5. Step 5: Solve for x
    x = 123,735,358,709.42/485,404.92
  6. Step 6: Final answer
    x = 254,911.63

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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.