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Finding the Fourth Proportional to 281,835.40, 388,930.80 and 154,508.80

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Solution

The fourth proportional to 281,835.40, 388,930.80 and 154,508.80 is: 213,221.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,835.40 : 388,930.80 = 154,508.80 : x
  2. Step 2: Convert to fraction form
    281,835.40/388,930.80 = 154,508.80/x
  3. Step 3: Cross multiply
    281,835.40x = 388,930.80 × 154,508.80
  4. Step 4: Simplify right side
    281,835.40x = 60,093,231,191.04
  5. Step 5: Solve for x
    x = 60,093,231,191.04/281,835.40
  6. Step 6: Final answer
    x = 213,221.02

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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.