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Finding the Fourth Proportional to 445,790, 668,793.04 and 256,371.60

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Solution

The fourth proportional to 445,790, 668,793.04 and 256,371.60 is: 384,619.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,790 : 668,793.04 = 256,371.60 : x
  2. Step 2: Convert to fraction form
    445,790/668,793.04 = 256,371.60/x
  3. Step 3: Cross multiply
    445,790x = 668,793.04 × 256,371.60
  4. Step 4: Simplify right side
    445,790x = 171,459,541,733.66
  5. Step 5: Solve for x
    x = 171,459,541,733.66/445,790
  6. Step 6: Final answer
    x = 384,619.53

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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.