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Finding the Fourth Proportional to 371,878.80, 558,401.40 and 214,414.80

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Solution

The fourth proportional to 371,878.80, 558,401.40 and 214,414.80 is: 321,958.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,878.80 : 558,401.40 = 214,414.80 : x
  2. Step 2: Convert to fraction form
    371,878.80/558,401.40 = 214,414.80/x
  3. Step 3: Cross multiply
    371,878.80x = 558,401.40 × 214,414.80
  4. Step 4: Simplify right side
    371,878.80x = 119,729,524,500.72
  5. Step 5: Solve for x
    x = 119,729,524,500.72/371,878.80
  6. Step 6: Final answer
    x = 321,958.46

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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.