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Finding the Fourth Proportional to 479,558.85, 661,807.25 and 261,780.45

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Solution

The fourth proportional to 479,558.85, 661,807.25 and 261,780.45 is: 361,265.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,558.85 : 661,807.25 = 261,780.45 : x
  2. Step 2: Convert to fraction form
    479,558.85/661,807.25 = 261,780.45/x
  3. Step 3: Cross multiply
    479,558.85x = 661,807.25 × 261,780.45
  4. Step 4: Simplify right side
    479,558.85x = 173,248,198,409.36
  5. Step 5: Solve for x
    x = 173,248,198,409.36/479,558.85
  6. Step 6: Final answer
    x = 361,265.77

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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.