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Finding the Fourth Proportional to 485,982.46, 728,382.66 and 343,868.68

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Solution

The fourth proportional to 485,982.46, 728,382.66 and 343,868.68 is: 515,384.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,982.46 : 728,382.66 = 343,868.68 : x
  2. Step 2: Convert to fraction form
    485,982.46/728,382.66 = 343,868.68/x
  3. Step 3: Cross multiply
    485,982.46x = 728,382.66 × 343,868.68
  4. Step 4: Simplify right side
    485,982.46x = 250,467,983,829.09
  5. Step 5: Solve for x
    x = 250,467,983,829.09/485,982.46
  6. Step 6: Final answer
    x = 515,384.82

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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.