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Finding the Fourth Proportional to 445,791.60, 669,124.80 and 221,405.40

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Solution

The fourth proportional to 445,791.60, 669,124.80 and 221,405.40 is: 332,325.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,791.60 : 669,124.80 = 221,405.40 : x
  2. Step 2: Convert to fraction form
    445,791.60/669,124.80 = 221,405.40/x
  3. Step 3: Cross multiply
    445,791.60x = 669,124.80 × 221,405.40
  4. Step 4: Simplify right side
    445,791.60x = 148,147,843,993.92
  5. Step 5: Solve for x
    x = 148,147,843,993.92/445,791.60
  6. Step 6: Final answer
    x = 332,325.34

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1.5x scale

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.