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Finding the Fourth Proportional to 281,985.54, 389,164.64 and 154,685.73

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Solution

The fourth proportional to 281,985.54, 389,164.64 and 154,685.73 is: 213,479.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,985.54 : 389,164.64 = 154,685.73 : x
  2. Step 2: Convert to fraction form
    281,985.54/389,164.64 = 154,685.73/x
  3. Step 3: Cross multiply
    281,985.54x = 389,164.64 × 154,685.73
  4. Step 4: Simplify right side
    281,985.54x = 60,198,217,114.53
  5. Step 5: Solve for x
    x = 60,198,217,114.53/281,985.54
  6. Step 6: Final answer
    x = 213,479.80

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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.