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Finding the Fourth Proportional to 445,484.75, 666,630.79 and 385,719.39

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Solution

The fourth proportional to 445,484.75, 666,630.79 and 385,719.39 is: 577,196.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,484.75 : 666,630.79 = 385,719.39 : x
  2. Step 2: Convert to fraction form
    445,484.75/666,630.79 = 385,719.39/x
  3. Step 3: Cross multiply
    445,484.75x = 666,630.79 × 385,719.39
  4. Step 4: Simplify right side
    445,484.75x = 257,132,420,709.72
  5. Step 5: Solve for x
    x = 257,132,420,709.72/445,484.75
  6. Step 6: Final answer
    x = 577,196.92

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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.