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Finding the Fourth Proportional to 485,455.80, 727,794.90 and 204,742.20

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Solution

The fourth proportional to 485,455.80, 727,794.90 and 204,742.20 is: 306,949.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,455.80 : 727,794.90 = 204,742.20 : x
  2. Step 2: Convert to fraction form
    485,455.80/727,794.90 = 204,742.20/x
  3. Step 3: Cross multiply
    485,455.80x = 727,794.90 × 204,742.20
  4. Step 4: Simplify right side
    485,455.80x = 149,010,328,974.78
  5. Step 5: Solve for x
    x = 149,010,328,974.78/485,455.80
  6. Step 6: Final answer
    x = 306,949.32

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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.