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Finding the Fourth Proportional to 445,535.20, 668,302.80 and 287,941.60

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Solution

The fourth proportional to 445,535.20, 668,302.80 and 287,941.60 is: 431,912.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,535.20 : 668,302.80 = 287,941.60 : x
  2. Step 2: Convert to fraction form
    445,535.20/668,302.80 = 287,941.60/x
  3. Step 3: Cross multiply
    445,535.20x = 668,302.80 × 287,941.60
  4. Step 4: Simplify right side
    445,535.20x = 192,432,177,516.48
  5. Step 5: Solve for x
    x = 192,432,177,516.48/445,535.20
  6. Step 6: Final answer
    x = 431,912.40

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Similar ratio
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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.