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Finding the Fourth Proportional to 365,397.96, 548,315.62 and 128,939.48

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Solution

The fourth proportional to 365,397.96, 548,315.62 and 128,939.48 is: 193,486.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,397.96 : 548,315.62 = 128,939.48 : x
  2. Step 2: Convert to fraction form
    365,397.96/548,315.62 = 128,939.48/x
  3. Step 3: Cross multiply
    365,397.96x = 548,315.62 × 128,939.48
  4. Step 4: Simplify right side
    365,397.96x = 70,699,530,918.68
  5. Step 5: Solve for x
    x = 70,699,530,918.68/365,397.96
  6. Step 6: Final answer
    x = 193,486.39

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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.