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Finding the Fourth Proportional to 394,300.88, 543,568.64 and 280,926.80

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Solution

The fourth proportional to 394,300.88, 543,568.64 and 280,926.80 is: 387,275.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,300.88 : 543,568.64 = 280,926.80 : x
  2. Step 2: Convert to fraction form
    394,300.88/543,568.64 = 280,926.80/x
  3. Step 3: Cross multiply
    394,300.88x = 543,568.64 × 280,926.80
  4. Step 4: Simplify right side
    394,300.88x = 152,702,998,615.55
  5. Step 5: Solve for x
    x = 152,702,998,615.55/394,300.88
  6. Step 6: Final answer
    x = 387,275.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.