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Finding the Fourth Proportional to 455,216.10, 682,824.15 and 219,020.10

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Solution

The fourth proportional to 455,216.10, 682,824.15 and 219,020.10 is: 328,530.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,216.10 : 682,824.15 = 219,020.10 : x
  2. Step 2: Convert to fraction form
    455,216.10/682,824.15 = 219,020.10/x
  3. Step 3: Cross multiply
    455,216.10x = 682,824.15 × 219,020.10
  4. Step 4: Simplify right side
    455,216.10x = 149,552,213,615.42
  5. Step 5: Solve for x
    x = 149,552,213,615.42/455,216.10
  6. Step 6: Final answer
    x = 328,530.15

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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.