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Finding the Fourth Proportional to 394,870.77, 592,305.69 and 128,630.85

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Solution

The fourth proportional to 394,870.77, 592,305.69 and 128,630.85 is: 192,946.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,870.77 : 592,305.69 = 128,630.85 : x
  2. Step 2: Convert to fraction form
    394,870.77/592,305.69 = 128,630.85/x
  3. Step 3: Cross multiply
    394,870.77x = 592,305.69 × 128,630.85
  4. Step 4: Simplify right side
    394,870.77x = 76,188,784,364.54
  5. Step 5: Solve for x
    x = 76,188,784,364.54/394,870.77
  6. Step 6: Final answer
    x = 192,946.12

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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.