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Finding the Fourth Proportional to 281,990.80, 389,161.56 and 154,678.24

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Solution

The fourth proportional to 281,990.80, 389,161.56 and 154,678.24 is: 213,463.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,990.80 : 389,161.56 = 154,678.24 : x
  2. Step 2: Convert to fraction form
    281,990.80/389,161.56 = 154,678.24/x
  3. Step 3: Cross multiply
    281,990.80x = 389,161.56 × 154,678.24
  4. Step 4: Simplify right side
    281,990.80x = 60,194,825,176.45
  5. Step 5: Solve for x
    x = 60,194,825,176.45/281,990.80
  6. Step 6: Final answer
    x = 213,463.79

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1.5x scale

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.