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Finding the Fourth Proportional to 394,724.40, 592,093.92 and 128,484

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Solution

The fourth proportional to 394,724.40, 592,093.92 and 128,484 is: 192,728.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,724.40 : 592,093.92 = 128,484 : x
  2. Step 2: Convert to fraction form
    394,724.40/592,093.92 = 128,484/x
  3. Step 3: Cross multiply
    394,724.40x = 592,093.92 × 128,484
  4. Step 4: Simplify right side
    394,724.40x = 76,074,595,217.28
  5. Step 5: Solve for x
    x = 76,074,595,217.28/394,724.40
  6. Step 6: Final answer
    x = 192,728.38

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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.