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Finding the Fourth Proportional to 281,990.16, 389,171.37 and 154,690.56

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Solution

The fourth proportional to 281,990.16, 389,171.37 and 154,690.56 is: 213,486.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,990.16 : 389,171.37 = 154,690.56 : x
  2. Step 2: Convert to fraction form
    281,990.16/389,171.37 = 154,690.56/x
  3. Step 3: Cross multiply
    281,990.16x = 389,171.37 × 154,690.56
  4. Step 4: Simplify right side
    281,990.16x = 60,201,137,161.27
  5. Step 5: Solve for x
    x = 60,201,137,161.27/281,990.16
  6. Step 6: Final answer
    x = 213,486.66

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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.