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Finding the Fourth Proportional to 479,668.56, 661,998.60 and 398,953.68

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Solution

The fourth proportional to 479,668.56, 661,998.60 and 398,953.68 is: 550,602.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,668.56 : 661,998.60 = 398,953.68 : x
  2. Step 2: Convert to fraction form
    479,668.56/661,998.60 = 398,953.68/x
  3. Step 3: Cross multiply
    479,668.56x = 661,998.60 × 398,953.68
  4. Step 4: Simplify right side
    479,668.56x = 264,106,777,624.85
  5. Step 5: Solve for x
    x = 264,106,777,624.85/479,668.56
  6. Step 6: Final answer
    x = 550,602.64

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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.