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Finding the Fourth Proportional to 445,205.89, 666,212.52 and 385,439.93

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Solution

The fourth proportional to 445,205.89, 666,212.52 and 385,439.93 is: 576,777.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,205.89 : 666,212.52 = 385,439.93 : x
  2. Step 2: Convert to fraction form
    445,205.89/666,212.52 = 385,439.93/x
  3. Step 3: Cross multiply
    445,205.89x = 666,212.52 × 385,439.93
  4. Step 4: Simplify right side
    445,205.89x = 256,784,903,481.19
  5. Step 5: Solve for x
    x = 256,784,903,481.19/445,205.89
  6. Step 6: Final answer
    x = 576,777.87

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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.