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Finding the Fourth Proportional to 265,279.80, 397,919.70 and 212,791.80

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Solution

The fourth proportional to 265,279.80, 397,919.70 and 212,791.80 is: 319,187.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,279.80 : 397,919.70 = 212,791.80 : x
  2. Step 2: Convert to fraction form
    265,279.80/397,919.70 = 212,791.80/x
  3. Step 3: Cross multiply
    265,279.80x = 397,919.70 × 212,791.80
  4. Step 4: Simplify right side
    265,279.80x = 84,674,049,218.46
  5. Step 5: Solve for x
    x = 84,674,049,218.46/265,279.80
  6. Step 6: Final answer
    x = 319,187.70

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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.