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Finding the Fourth Proportional to 485,906.92, 728,357.34 and 236,278.76

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Solution

The fourth proportional to 485,906.92, 728,357.34 and 236,278.76 is: 354,173.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,906.92 : 728,357.34 = 236,278.76 : x
  2. Step 2: Convert to fraction form
    485,906.92/728,357.34 = 236,278.76/x
  3. Step 3: Cross multiply
    485,906.92x = 728,357.34 × 236,278.76
  4. Step 4: Simplify right side
    485,906.92x = 172,095,369,132.10
  5. Step 5: Solve for x
    x = 172,095,369,132.10/485,906.92
  6. Step 6: Final answer
    x = 354,173.53

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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.