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Finding the Fourth Proportional to 445,793.60, 669,127.80 and 221,407.40

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Solution

The fourth proportional to 445,793.60, 669,127.80 and 221,407.40 is: 332,328.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,793.60 : 669,127.80 = 221,407.40 : x
  2. Step 2: Convert to fraction form
    445,793.60/669,127.80 = 221,407.40/x
  3. Step 3: Cross multiply
    445,793.60x = 669,127.80 × 221,407.40
  4. Step 4: Simplify right side
    445,793.60x = 148,149,846,465.72
  5. Step 5: Solve for x
    x = 148,149,846,465.72/445,793.60
  6. Step 6: Final answer
    x = 332,328.34

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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.