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Finding the Fourth Proportional to 281,980.62, 389,143.17 and 154,656.72

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Solution

The fourth proportional to 281,980.62, 389,143.17 and 154,656.72 is: 213,431.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,980.62 : 389,143.17 = 154,656.72 : x
  2. Step 2: Convert to fraction form
    281,980.62/389,143.17 = 154,656.72/x
  3. Step 3: Cross multiply
    281,980.62x = 389,143.17 × 154,656.72
  4. Step 4: Simplify right side
    281,980.62x = 60,183,606,282.60
  5. Step 5: Solve for x
    x = 60,183,606,282.60/281,980.62
  6. Step 6: Final answer
    x = 213,431.71

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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.