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Finding the Fourth Proportional to 394,798.80, 592,065.59 and 128,496.69

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Solution

The fourth proportional to 394,798.80, 592,065.59 and 128,496.69 is: 192,701.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,798.80 : 592,065.59 = 128,496.69 : x
  2. Step 2: Convert to fraction form
    394,798.80/592,065.59 = 128,496.69/x
  3. Step 3: Cross multiply
    394,798.80x = 592,065.59 × 128,496.69
  4. Step 4: Simplify right side
    394,798.80x = 76,078,468,577.90
  5. Step 5: Solve for x
    x = 76,078,468,577.90/394,798.80
  6. Step 6: Final answer
    x = 192,701.87

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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.