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Finding the Fourth Proportional to 363,911.40, 545,867.10 and 221,610.60

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Solution

The fourth proportional to 363,911.40, 545,867.10 and 221,610.60 is: 332,415.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,911.40 : 545,867.10 = 221,610.60 : x
  2. Step 2: Convert to fraction form
    363,911.40/545,867.10 = 221,610.60/x
  3. Step 3: Cross multiply
    363,911.40x = 545,867.10 × 221,610.60
  4. Step 4: Simplify right side
    363,911.40x = 120,969,935,551.26
  5. Step 5: Solve for x
    x = 120,969,935,551.26/363,911.40
  6. Step 6: Final answer
    x = 332,415.90

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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.