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Finding the Fourth Proportional to 285,960.40, 428,940.60 and 108,408.40

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Solution

The fourth proportional to 285,960.40, 428,940.60 and 108,408.40 is: 162,612.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,960.40 : 428,940.60 = 108,408.40 : x
  2. Step 2: Convert to fraction form
    285,960.40/428,940.60 = 108,408.40/x
  3. Step 3: Cross multiply
    285,960.40x = 428,940.60 × 108,408.40
  4. Step 4: Simplify right side
    285,960.40x = 46,500,764,141.04
  5. Step 5: Solve for x
    x = 46,500,764,141.04/285,960.40
  6. Step 6: Final answer
    x = 162,612.60

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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.