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Finding the Fourth Proportional to 300,815.78, 415,314.52 and 193,572.18

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Solution

The fourth proportional to 300,815.78, 415,314.52 and 193,572.18 is: 267,251.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,815.78 : 415,314.52 = 193,572.18 : x
  2. Step 2: Convert to fraction form
    300,815.78/415,314.52 = 193,572.18/x
  3. Step 3: Cross multiply
    300,815.78x = 415,314.52 × 193,572.18
  4. Step 4: Simplify right side
    300,815.78x = 80,393,336,538.12
  5. Step 5: Solve for x
    x = 80,393,336,538.12/300,815.78
  6. Step 6: Final answer
    x = 267,251.07

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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.