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Finding the Fourth Proportional to 485,721.92, 728,608.80 and 153,272

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Solution

The fourth proportional to 485,721.92, 728,608.80 and 153,272 is: 229,916.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,721.92 : 728,608.80 = 153,272 : x
  2. Step 2: Convert to fraction form
    485,721.92/728,608.80 = 153,272/x
  3. Step 3: Cross multiply
    485,721.92x = 728,608.80 × 153,272
  4. Step 4: Simplify right side
    485,721.92x = 111,675,327,993.60
  5. Step 5: Solve for x
    x = 111,675,327,993.60/485,721.92
  6. Step 6: Final answer
    x = 229,916.18

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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.