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Finding the Fourth Proportional to 394,947.20, 592,492.08 and 128,684

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Solution

The fourth proportional to 394,947.20, 592,492.08 and 128,684 is: 193,049.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,947.20 : 592,492.08 = 128,684 : x
  2. Step 2: Convert to fraction form
    394,947.20/592,492.08 = 128,684/x
  3. Step 3: Cross multiply
    394,947.20x = 592,492.08 × 128,684
  4. Step 4: Simplify right side
    394,947.20x = 76,244,250,822.72
  5. Step 5: Solve for x
    x = 76,244,250,822.72/394,947.20
  6. Step 6: Final answer
    x = 193,049.22

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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.