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Finding the Fourth Proportional to 394,960.64, 592,490.46 and 128,649.64

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Solution

The fourth proportional to 394,960.64, 592,490.46 and 128,649.64 is: 192,990.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,960.64 : 592,490.46 = 128,649.64 : x
  2. Step 2: Convert to fraction form
    394,960.64/592,490.46 = 128,649.64/x
  3. Step 3: Cross multiply
    394,960.64x = 592,490.46 × 128,649.64
  4. Step 4: Simplify right side
    394,960.64x = 76,223,684,382.43
  5. Step 5: Solve for x
    x = 76,223,684,382.43/394,960.64
  6. Step 6: Final answer
    x = 192,990.58

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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.