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Finding the Fourth Proportional to 427,958.55, 641,474.45 and 278,306.25

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Solution

The fourth proportional to 427,958.55, 641,474.45 and 278,306.25 is: 417,158.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,958.55 : 641,474.45 = 278,306.25 : x
  2. Step 2: Convert to fraction form
    427,958.55/641,474.45 = 278,306.25/x
  3. Step 3: Cross multiply
    427,958.55x = 641,474.45 × 278,306.25
  4. Step 4: Simplify right side
    427,958.55x = 178,526,345,896.90
  5. Step 5: Solve for x
    x = 178,526,345,896.90/427,958.55
  6. Step 6: Final answer
    x = 417,158.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.