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Finding the Fourth Proportional to 373,836.40, 515,887.60 and 212,687.98

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Solution

The fourth proportional to 373,836.40, 515,887.60 and 212,687.98 is: 293,505.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,836.40 : 515,887.60 = 212,687.98 : x
  2. Step 2: Convert to fraction form
    373,836.40/515,887.60 = 212,687.98/x
  3. Step 3: Cross multiply
    373,836.40x = 515,887.60 × 212,687.98
  4. Step 4: Simplify right side
    373,836.40x = 109,723,091,551.05
  5. Step 5: Solve for x
    x = 109,723,091,551.05/373,836.40
  6. Step 6: Final answer
    x = 293,505.64

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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.