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Finding the Fourth Proportional to 479,561.85, 661,811.39 and 261,783.45

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Solution

The fourth proportional to 479,561.85, 661,811.39 and 261,783.45 is: 361,269.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,561.85 : 661,811.39 = 261,783.45 : x
  2. Step 2: Convert to fraction form
    479,561.85/661,811.39 = 261,783.45/x
  3. Step 3: Cross multiply
    479,561.85x = 661,811.39 × 261,783.45
  4. Step 4: Simplify right side
    479,561.85x = 173,251,268,923.50
  5. Step 5: Solve for x
    x = 173,251,268,923.50/479,561.85
  6. Step 6: Final answer
    x = 361,269.92

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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.