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Finding the Fourth Proportional to 411,942.40, 617,913.60 and 318,630.40

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Solution

The fourth proportional to 411,942.40, 617,913.60 and 318,630.40 is: 477,945.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,942.40 : 617,913.60 = 318,630.40 : x
  2. Step 2: Convert to fraction form
    411,942.40/617,913.60 = 318,630.40/x
  3. Step 3: Cross multiply
    411,942.40x = 617,913.60 × 318,630.40
  4. Step 4: Simplify right side
    411,942.40x = 196,886,057,533.44
  5. Step 5: Solve for x
    x = 196,886,057,533.44/411,942.40
  6. Step 6: Final answer
    x = 477,945.60

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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.