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Finding the Fourth Proportional to 363,912.40, 545,868.60 and 221,611.60

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Solution

The fourth proportional to 363,912.40, 545,868.60 and 221,611.60 is: 332,417.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,912.40 : 545,868.60 = 221,611.60 : x
  2. Step 2: Convert to fraction form
    363,912.40/545,868.60 = 221,611.60/x
  3. Step 3: Cross multiply
    363,912.40x = 545,868.60 × 221,611.60
  4. Step 4: Simplify right side
    363,912.40x = 120,970,813,835.76
  5. Step 5: Solve for x
    x = 120,970,813,835.76/363,912.40
  6. Step 6: Final answer
    x = 332,417.40

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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.