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Finding the Fourth Proportional to 259,637.60, 389,469.20 and 135,221.60

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Solution

The fourth proportional to 259,637.60, 389,469.20 and 135,221.60 is: 202,839.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,637.60 : 389,469.20 = 135,221.60 : x
  2. Step 2: Convert to fraction form
    259,637.60/389,469.20 = 135,221.60/x
  3. Step 3: Cross multiply
    259,637.60x = 389,469.20 × 135,221.60
  4. Step 4: Simplify right side
    259,637.60x = 52,664,648,374.72
  5. Step 5: Solve for x
    x = 52,664,648,374.72/259,637.60
  6. Step 6: Final answer
    x = 202,839.07

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1.5x scale

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.