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Finding the Fourth Proportional to 266,190.64, 399,343.37 and 76,649.73

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Solution

The fourth proportional to 266,190.64, 399,343.37 and 76,649.73 is: 114,991.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    266,190.64 : 399,343.37 = 76,649.73 : x
  2. Step 2: Convert to fraction form
    266,190.64/399,343.37 = 76,649.73/x
  3. Step 3: Cross multiply
    266,190.64x = 399,343.37 × 76,649.73
  4. Step 4: Simplify right side
    266,190.64x = 30,609,561,487.79
  5. Step 5: Solve for x
    x = 30,609,561,487.79/266,190.64
  6. Step 6: Final answer
    x = 114,991.13

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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.