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Finding the Fourth Proportional to 411,436.80, 617,155.20 and 130,982.40

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Solution

The fourth proportional to 411,436.80, 617,155.20 and 130,982.40 is: 196,473.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,436.80 : 617,155.20 = 130,982.40 : x
  2. Step 2: Convert to fraction form
    411,436.80/617,155.20 = 130,982.40/x
  3. Step 3: Cross multiply
    411,436.80x = 617,155.20 × 130,982.40
  4. Step 4: Simplify right side
    411,436.80x = 80,836,469,268.48
  5. Step 5: Solve for x
    x = 80,836,469,268.48/411,436.80
  6. Step 6: Final answer
    x = 196,473.60

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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.