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Finding the Fourth Proportional to 356,357.72, 491,781.48 and 203,392.82

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Solution

The fourth proportional to 356,357.72, 491,781.48 and 203,392.82 is: 280,686.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,357.72 : 491,781.48 = 203,392.82 : x
  2. Step 2: Convert to fraction form
    356,357.72/491,781.48 = 203,392.82/x
  3. Step 3: Cross multiply
    356,357.72x = 491,781.48 × 203,392.82
  4. Step 4: Simplify right side
    356,357.72x = 100,024,822,040.97
  5. Step 5: Solve for x
    x = 100,024,822,040.97/356,357.72
  6. Step 6: Final answer
    x = 280,686.56

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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.