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Finding the Fourth Proportional to 479,221.60, 661,302.24 and 288,197.92

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Solution

The fourth proportional to 479,221.60, 661,302.24 and 288,197.92 is: 397,698.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,221.60 : 661,302.24 = 288,197.92 : x
  2. Step 2: Convert to fraction form
    479,221.60/661,302.24 = 288,197.92/x
  3. Step 3: Cross multiply
    479,221.60x = 661,302.24 × 288,197.92
  4. Step 4: Simplify right side
    479,221.60x = 190,585,930,059.34
  5. Step 5: Solve for x
    x = 190,585,930,059.34/479,221.60
  6. Step 6: Final answer
    x = 397,698.96

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1.5x scale

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.