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Finding the Fourth Proportional to 266,200.84, 399,299.64 and 66,520.20

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Solution

The fourth proportional to 266,200.84, 399,299.64 and 66,520.20 is: 99,779.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,200.84 : 399,299.64 = 66,520.20 : x
  2. Step 2: Convert to fraction form
    266,200.84/399,299.64 = 66,520.20/x
  3. Step 3: Cross multiply
    266,200.84x = 399,299.64 × 66,520.20
  4. Step 4: Simplify right side
    266,200.84x = 26,561,491,912.73
  5. Step 5: Solve for x
    x = 26,561,491,912.73/266,200.84
  6. Step 6: Final answer
    x = 99,779.90

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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.