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Finding the Fourth Proportional to 373,791.18, 515,813.90 and 212,631.15

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Solution

The fourth proportional to 373,791.18, 515,813.90 and 212,631.15 is: 293,420.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,791.18 : 515,813.90 = 212,631.15 : x
  2. Step 2: Convert to fraction form
    373,791.18/515,813.90 = 212,631.15/x
  3. Step 3: Cross multiply
    373,791.18x = 515,813.90 × 212,631.15
  4. Step 4: Simplify right side
    373,791.18x = 109,678,101,679.83
  5. Step 5: Solve for x
    x = 109,678,101,679.83/373,791.18
  6. Step 6: Final answer
    x = 293,420.79

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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.