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Finding the Fourth Proportional to 281,543.69, 388,530.45 and 154,221.41

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Solution

The fourth proportional to 281,543.69, 388,530.45 and 154,221.41 is: 212,825.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,543.69 : 388,530.45 = 154,221.41 : x
  2. Step 2: Convert to fraction form
    281,543.69/388,530.45 = 154,221.41/x
  3. Step 3: Cross multiply
    281,543.69x = 388,530.45 × 154,221.41
  4. Step 4: Simplify right side
    281,543.69x = 59,919,711,884.28
  5. Step 5: Solve for x
    x = 59,919,711,884.28/281,543.69
  6. Step 6: Final answer
    x = 212,825.63

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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.