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Finding the Fourth Proportional to 276,747.60, 415,121.40 and 252,253.20

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Solution

The fourth proportional to 276,747.60, 415,121.40 and 252,253.20 is: 378,379.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,747.60 : 415,121.40 = 252,253.20 : x
  2. Step 2: Convert to fraction form
    276,747.60/415,121.40 = 252,253.20/x
  3. Step 3: Cross multiply
    276,747.60x = 415,121.40 × 252,253.20
  4. Step 4: Simplify right side
    276,747.60x = 104,715,701,538.48
  5. Step 5: Solve for x
    x = 104,715,701,538.48/276,747.60
  6. Step 6: Final answer
    x = 378,379.80

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1.5x scale

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.