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Finding the Fourth Proportional to 373,830.70, 515,879.76 and 212,682.30

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Solution

The fourth proportional to 373,830.70, 515,879.76 and 212,682.30 is: 293,497.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,830.70 : 515,879.76 = 212,682.30 : x
  2. Step 2: Convert to fraction form
    373,830.70/515,879.76 = 212,682.30/x
  3. Step 3: Cross multiply
    373,830.70x = 515,879.76 × 212,682.30
  4. Step 4: Simplify right side
    373,830.70x = 109,718,493,880.25
  5. Step 5: Solve for x
    x = 109,718,493,880.25/373,830.70
  6. Step 6: Final answer
    x = 293,497.82

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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.