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Finding the Fourth Proportional to 638,311.80, 957,122.10 and 264,372.60

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Solution

The fourth proportional to 638,311.80, 957,122.10 and 264,372.60 is: 396,415.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,311.80 : 957,122.10 = 264,372.60 : x
  2. Step 2: Convert to fraction form
    638,311.80/957,122.10 = 264,372.60/x
  3. Step 3: Cross multiply
    638,311.80x = 957,122.10 × 264,372.60
  4. Step 4: Simplify right side
    638,311.80x = 253,036,858,094.46
  5. Step 5: Solve for x
    x = 253,036,858,094.46/638,311.80
  6. Step 6: Final answer
    x = 396,415.76

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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.