Home / 493,428.11-680,892.78-278,589.38

Finding the Fourth Proportional to 493,428.11, 680,892.78 and 278,589.38

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Solution

The fourth proportional to 493,428.11, 680,892.78 and 278,589.38 is: 384,431.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,428.11 : 680,892.78 = 278,589.38 : x
  2. Step 2: Convert to fraction form
    493,428.11/680,892.78 = 278,589.38/x
  3. Step 3: Cross multiply
    493,428.11x = 680,892.78 × 278,589.38
  4. Step 4: Simplify right side
    493,428.11x = 189,689,492,629.27
  5. Step 5: Solve for x
    x = 189,689,492,629.27/493,428.11
  6. Step 6: Final answer
    x = 384,431.88

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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.