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Finding the Fourth Proportional to 373,212.96, 515,015.28 and 212,046.72

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Solution

The fourth proportional to 373,212.96, 515,015.28 and 212,046.72 is: 292,613.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,212.96 : 515,015.28 = 212,046.72 : x
  2. Step 2: Convert to fraction form
    373,212.96/515,015.28 = 212,046.72/x
  3. Step 3: Cross multiply
    373,212.96x = 515,015.28 × 212,046.72
  4. Step 4: Simplify right side
    373,212.96x = 109,207,300,873.88
  5. Step 5: Solve for x
    x = 109,207,300,873.88/373,212.96
  6. Step 6: Final answer
    x = 292,613.90

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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.