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Finding the Fourth Proportional to 257,466.90, 386,200.35 and 80,028.30

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Solution

The fourth proportional to 257,466.90, 386,200.35 and 80,028.30 is: 120,042.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,466.90 : 386,200.35 = 80,028.30 : x
  2. Step 2: Convert to fraction form
    257,466.90/386,200.35 = 80,028.30/x
  3. Step 3: Cross multiply
    257,466.90x = 386,200.35 × 80,028.30
  4. Step 4: Simplify right side
    257,466.90x = 30,906,957,469.91
  5. Step 5: Solve for x
    x = 30,906,957,469.91/257,466.90
  6. Step 6: Final answer
    x = 120,042.45

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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.