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Finding the Fourth Proportional to 485,586.92, 728,380.70 and 153,188.84

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Solution

The fourth proportional to 485,586.92, 728,380.70 and 153,188.84 is: 229,783.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,586.92 : 728,380.70 = 153,188.84 : x
  2. Step 2: Convert to fraction form
    485,586.92/728,380.70 = 153,188.84/x
  3. Step 3: Cross multiply
    485,586.92x = 728,380.70 × 153,188.84
  4. Step 4: Simplify right side
    485,586.92x = 111,579,794,511.39
  5. Step 5: Solve for x
    x = 111,579,794,511.39/485,586.92
  6. Step 6: Final answer
    x = 229,783.36

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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.