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Finding the Fourth Proportional to 443,440.60, 664,431.30 and 256,125.40

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Solution

The fourth proportional to 443,440.60, 664,431.30 and 256,125.40 is: 383,766.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,440.60 : 664,431.30 = 256,125.40 : x
  2. Step 2: Convert to fraction form
    443,440.60/664,431.30 = 256,125.40/x
  3. Step 3: Cross multiply
    443,440.60x = 664,431.30 × 256,125.40
  4. Step 4: Simplify right side
    443,440.60x = 170,177,732,485.02
  5. Step 5: Solve for x
    x = 170,177,732,485.02/443,440.60
  6. Step 6: Final answer
    x = 383,766.69

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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.