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Finding the Fourth Proportional to 395,023.80, 592,629.30 and 128,785.80

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Solution

The fourth proportional to 395,023.80, 592,629.30 and 128,785.80 is: 193,209.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,023.80 : 592,629.30 = 128,785.80 : x
  2. Step 2: Convert to fraction form
    395,023.80/592,629.30 = 128,785.80/x
  3. Step 3: Cross multiply
    395,023.80x = 592,629.30 × 128,785.80
  4. Step 4: Simplify right side
    395,023.80x = 76,322,238,503.94
  5. Step 5: Solve for x
    x = 76,322,238,503.94/395,023.80
  6. Step 6: Final answer
    x = 193,209.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.