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Finding the Fourth Proportional to 394,866.65, 592,299.51 and 128,626.74

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Solution

The fourth proportional to 394,866.65, 592,299.51 and 128,626.74 is: 192,939.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,866.65 : 592,299.51 = 128,626.74 : x
  2. Step 2: Convert to fraction form
    394,866.65/592,299.51 = 128,626.74/x
  3. Step 3: Cross multiply
    394,866.65x = 592,299.51 × 128,626.74
  4. Step 4: Simplify right side
    394,866.65x = 76,185,555,074.90
  5. Step 5: Solve for x
    x = 76,185,555,074.90/394,866.65
  6. Step 6: Final answer
    x = 192,939.96

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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.