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Finding the Fourth Proportional to 411,376.80, 617,065.20 and 130,922.40

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Solution

The fourth proportional to 411,376.80, 617,065.20 and 130,922.40 is: 196,383.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,376.80 : 617,065.20 = 130,922.40 : x
  2. Step 2: Convert to fraction form
    411,376.80/617,065.20 = 130,922.40/x
  3. Step 3: Cross multiply
    411,376.80x = 617,065.20 × 130,922.40
  4. Step 4: Simplify right side
    411,376.80x = 80,787,656,940.48
  5. Step 5: Solve for x
    x = 80,787,656,940.48/411,376.80
  6. Step 6: Final answer
    x = 196,383.60

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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.