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Finding the Fourth Proportional to 373,661.15, 515,663.78 and 212,539.41

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Solution

The fourth proportional to 373,661.15, 515,663.78 and 212,539.41 is: 293,310.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,661.15 : 515,663.78 = 212,539.41 : x
  2. Step 2: Convert to fraction form
    373,661.15/515,663.78 = 212,539.41/x
  3. Step 3: Cross multiply
    373,661.15x = 515,663.78 × 212,539.41
  4. Step 4: Simplify right side
    373,661.15x = 109,598,874,496.87
  5. Step 5: Solve for x
    x = 109,598,874,496.87/373,661.15
  6. Step 6: Final answer
    x = 293,310.87

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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.