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Finding the Fourth Proportional to 394,332.76, 543,612.78 and 280,958.68

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Solution

The fourth proportional to 394,332.76, 543,612.78 and 280,958.68 is: 387,319.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,332.76 : 543,612.78 = 280,958.68 : x
  2. Step 2: Convert to fraction form
    394,332.76/543,612.78 = 280,958.68/x
  3. Step 3: Cross multiply
    394,332.76x = 543,612.78 × 280,958.68
  4. Step 4: Simplify right side
    394,332.76x = 152,732,729,099.93
  5. Step 5: Solve for x
    x = 152,732,729,099.93/394,332.76
  6. Step 6: Final answer
    x = 387,319.40

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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.