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Finding the Fourth Proportional to 270,691.74, 405,769.77 and 128,286.72

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Solution

The fourth proportional to 270,691.74, 405,769.77 and 128,286.72 is: 192,303.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,691.74 : 405,769.77 = 128,286.72 : x
  2. Step 2: Convert to fraction form
    270,691.74/405,769.77 = 128,286.72/x
  3. Step 3: Cross multiply
    270,691.74x = 405,769.77 × 128,286.72
  4. Step 4: Simplify right side
    270,691.74x = 52,054,872,868.45
  5. Step 5: Solve for x
    x = 52,054,872,868.45/270,691.74
  6. Step 6: Final answer
    x = 192,303.14

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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.