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Finding the Fourth Proportional to 485,983.46, 728,384.16 and 343,869.68

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Solution

The fourth proportional to 485,983.46, 728,384.16 and 343,869.68 is: 515,386.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,983.46 : 728,384.16 = 343,869.68 : x
  2. Step 2: Convert to fraction form
    485,983.46/728,384.16 = 343,869.68/x
  3. Step 3: Cross multiply
    485,983.46x = 728,384.16 × 343,869.68
  4. Step 4: Simplify right side
    485,983.46x = 250,469,228,016.27
  5. Step 5: Solve for x
    x = 250,469,228,016.27/485,983.46
  6. Step 6: Final answer
    x = 515,386.32

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1.5x scale

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.