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Finding the Fourth Proportional to 373,239.40, 515,067.78 and 212,081.80

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Solution

The fourth proportional to 373,239.40, 515,067.78 and 212,081.80 is: 292,671.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,239.40 : 515,067.78 = 212,081.80 : x
  2. Step 2: Convert to fraction form
    373,239.40/515,067.78 = 212,081.80/x
  3. Step 3: Cross multiply
    373,239.40x = 515,067.78 × 212,081.80
  4. Step 4: Simplify right side
    373,239.40x = 109,236,501,904.40
  5. Step 5: Solve for x
    x = 109,236,501,904.40/373,239.40
  6. Step 6: Final answer
    x = 292,671.41

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.