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Finding the Fourth Proportional to 408,090.80, 612,136.20 and 248,423.60

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Solution

The fourth proportional to 408,090.80, 612,136.20 and 248,423.60 is: 372,635.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,090.80 : 612,136.20 = 248,423.60 : x
  2. Step 2: Convert to fraction form
    408,090.80/612,136.20 = 248,423.60/x
  3. Step 3: Cross multiply
    408,090.80x = 612,136.20 × 248,423.60
  4. Step 4: Simplify right side
    408,090.80x = 152,069,078,494.32
  5. Step 5: Solve for x
    x = 152,069,078,494.32/408,090.80
  6. Step 6: Final answer
    x = 372,635.40

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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.