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Finding the Fourth Proportional to 455,274.70, 682,912.05 and 218,560.30

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Solution

The fourth proportional to 455,274.70, 682,912.05 and 218,560.30 is: 327,840.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,274.70 : 682,912.05 = 218,560.30 : x
  2. Step 2: Convert to fraction form
    455,274.70/682,912.05 = 218,560.30/x
  3. Step 3: Cross multiply
    455,274.70x = 682,912.05 × 218,560.30
  4. Step 4: Simplify right side
    455,274.70x = 149,257,462,521.62
  5. Step 5: Solve for x
    x = 149,257,462,521.62/455,274.70
  6. Step 6: Final answer
    x = 327,840.45

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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.