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Finding the Fourth Proportional to 393,118.38, 589,674.33 and 112,635.90

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Solution

The fourth proportional to 393,118.38, 589,674.33 and 112,635.90 is: 168,952.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,118.38 : 589,674.33 = 112,635.90 : x
  2. Step 2: Convert to fraction form
    393,118.38/589,674.33 = 112,635.90/x
  3. Step 3: Cross multiply
    393,118.38x = 589,674.33 × 112,635.90
  4. Step 4: Simplify right side
    393,118.38x = 66,418,498,866.45
  5. Step 5: Solve for x
    x = 66,418,498,866.45/393,118.38
  6. Step 6: Final answer
    x = 168,952.92

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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.