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Finding the Fourth Proportional to 398,983.92, 550,099.80 and 255,508.08

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Solution

The fourth proportional to 398,983.92, 550,099.80 and 255,508.08 is: 352,282.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,983.92 : 550,099.80 = 255,508.08 : x
  2. Step 2: Convert to fraction form
    398,983.92/550,099.80 = 255,508.08/x
  3. Step 3: Cross multiply
    398,983.92x = 550,099.80 × 255,508.08
  4. Step 4: Simplify right side
    398,983.92x = 140,554,943,706.38
  5. Step 5: Solve for x
    x = 140,554,943,706.38/398,983.92
  6. Step 6: Final answer
    x = 352,282.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.