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Finding the Fourth Proportional to 394,776.75, 592,103.30 and 128,535.47

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Solution

The fourth proportional to 394,776.75, 592,103.30 and 128,535.47 is: 192,783.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,776.75 : 592,103.30 = 128,535.47 : x
  2. Step 2: Convert to fraction form
    394,776.75/592,103.30 = 128,535.47/x
  3. Step 3: Cross multiply
    394,776.75x = 592,103.30 × 128,535.47
  4. Step 4: Simplify right side
    394,776.75x = 76,106,275,954.05
  5. Step 5: Solve for x
    x = 76,106,275,954.05/394,776.75
  6. Step 6: Final answer
    x = 192,783.08

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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.