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Finding the Fourth Proportional to 445,493.73, 666,644.30 and 385,728.39

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Solution

The fourth proportional to 445,493.73, 666,644.30 and 385,728.39 is: 577,210.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,493.73 : 666,644.30 = 385,728.39 : x
  2. Step 2: Convert to fraction form
    445,493.73/666,644.30 = 385,728.39/x
  3. Step 3: Cross multiply
    445,493.73x = 666,644.30 × 385,728.39
  4. Step 4: Simplify right side
    445,493.73x = 257,143,630,613.04
  5. Step 5: Solve for x
    x = 257,143,630,613.04/445,493.73
  6. Step 6: Final answer
    x = 577,210.44

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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.