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Finding the Fourth Proportional to 281,911.82, 389,056.02 and 154,587.41

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Solution

The fourth proportional to 281,911.82, 389,056.02 and 154,587.41 is: 213,340.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,911.82 : 389,056.02 = 154,587.41 : x
  2. Step 2: Convert to fraction form
    281,911.82/389,056.02 = 154,587.41/x
  3. Step 3: Cross multiply
    281,911.82x = 389,056.02 × 154,587.41
  4. Step 4: Simplify right side
    281,911.82x = 60,143,163,591.85
  5. Step 5: Solve for x
    x = 60,143,163,591.85/281,911.82
  6. Step 6: Final answer
    x = 213,340.34

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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.