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Finding the Fourth Proportional to 394,287.85, 543,550.71 and 280,913.77

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Solution

The fourth proportional to 394,287.85, 543,550.71 and 280,913.77 is: 387,257.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,287.85 : 543,550.71 = 280,913.77 : x
  2. Step 2: Convert to fraction form
    394,287.85/543,550.71 = 280,913.77/x
  3. Step 3: Cross multiply
    394,287.85x = 543,550.71 × 280,913.77
  4. Step 4: Simplify right side
    394,287.85x = 152,690,879,132.28
  5. Step 5: Solve for x
    x = 152,690,879,132.28/394,287.85
  6. Step 6: Final answer
    x = 387,257.38

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1.5x scale

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.