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Finding the Fourth Proportional to 408,617.50, 612,928.98 and 142,383.10

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Solution

The fourth proportional to 408,617.50, 612,928.98 and 142,383.10 is: 213,575.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,617.50 : 612,928.98 = 142,383.10 : x
  2. Step 2: Convert to fraction form
    408,617.50/612,928.98 = 142,383.10/x
  3. Step 3: Cross multiply
    408,617.50x = 612,928.98 × 142,383.10
  4. Step 4: Simplify right side
    408,617.50x = 87,270,728,252.24
  5. Step 5: Solve for x
    x = 87,270,728,252.24/408,617.50
  6. Step 6: Final answer
    x = 213,575.60

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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.