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Finding the Fourth Proportional to 321,026.28, 442,869.28 and 207,885.48

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Solution

The fourth proportional to 321,026.28, 442,869.28 and 207,885.48 is: 286,786.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,026.28 : 442,869.28 = 207,885.48 : x
  2. Step 2: Convert to fraction form
    321,026.28/442,869.28 = 207,885.48/x
  3. Step 3: Cross multiply
    321,026.28x = 442,869.28 × 207,885.48
  4. Step 4: Simplify right side
    321,026.28x = 92,066,092,850.05
  5. Step 5: Solve for x
    x = 92,066,092,850.05/321,026.28
  6. Step 6: Final answer
    x = 286,786.78

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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.