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Finding the Fourth Proportional to 608,928.92, 840,041.54 and 394,138

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Solution

The fourth proportional to 608,928.92, 840,041.54 and 394,138 is: 543,728.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    608,928.92 : 840,041.54 = 394,138 : x
  2. Step 2: Convert to fraction form
    608,928.92/840,041.54 = 394,138/x
  3. Step 3: Cross multiply
    608,928.92x = 840,041.54 × 394,138
  4. Step 4: Simplify right side
    608,928.92x = 331,092,292,492.52
  5. Step 5: Solve for x
    x = 331,092,292,492.52/608,928.92
  6. Step 6: Final answer
    x = 543,728.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.