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Finding the Fourth Proportional to 321,363.36, 443,480.28 and 178,122

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Solution

The fourth proportional to 321,363.36, 443,480.28 and 178,122 is: 245,807.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,363.36 : 443,480.28 = 178,122 : x
  2. Step 2: Convert to fraction form
    321,363.36/443,480.28 = 178,122/x
  3. Step 3: Cross multiply
    321,363.36x = 443,480.28 × 178,122
  4. Step 4: Simplify right side
    321,363.36x = 78,993,594,434.16
  5. Step 5: Solve for x
    x = 78,993,594,434.16/321,363.36
  6. Step 6: Final answer
    x = 245,807.72

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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.