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Finding the Fourth Proportional to 479,265.64, 661,385.78 and 261,474.30

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Solution

The fourth proportional to 479,265.64, 661,385.78 and 261,474.30 is: 360,834.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,265.64 : 661,385.78 = 261,474.30 : x
  2. Step 2: Convert to fraction form
    479,265.64/661,385.78 = 261,474.30/x
  3. Step 3: Cross multiply
    479,265.64x = 661,385.78 × 261,474.30
  4. Step 4: Simplify right side
    479,265.64x = 172,935,383,855.45
  5. Step 5: Solve for x
    x = 172,935,383,855.45/479,265.64
  6. Step 6: Final answer
    x = 360,834.10

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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.