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Finding the Fourth Proportional to 393,418.66, 589,983.38 and 140,630.94

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Solution

The fourth proportional to 393,418.66, 589,983.38 and 140,630.94 is: 210,894.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,418.66 : 589,983.38 = 140,630.94 : x
  2. Step 2: Convert to fraction form
    393,418.66/589,983.38 = 140,630.94/x
  3. Step 3: Cross multiply
    393,418.66x = 589,983.38 × 140,630.94
  4. Step 4: Simplify right side
    393,418.66x = 82,969,917,313.78
  5. Step 5: Solve for x
    x = 82,969,917,313.78/393,418.66
  6. Step 6: Final answer
    x = 210,894.72

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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.