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Finding the Fourth Proportional to 500,930.30, 691,310.31 and 274,585.34

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Solution

The fourth proportional to 500,930.30, 691,310.31 and 274,585.34 is: 378,942.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,930.30 : 691,310.31 = 274,585.34 : x
  2. Step 2: Convert to fraction form
    500,930.30/691,310.31 = 274,585.34/x
  3. Step 3: Cross multiply
    500,930.30x = 691,310.31 × 274,585.34
  4. Step 4: Simplify right side
    500,930.30x = 189,823,676,516.86
  5. Step 5: Solve for x
    x = 189,823,676,516.86/500,930.30
  6. Step 6: Final answer
    x = 378,942.29

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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.