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Finding the Fourth Proportional to 373,361.10, 515,207.70 and 212,179.20

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Solution

The fourth proportional to 373,361.10, 515,207.70 and 212,179.20 is: 292,789.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    373,361.10 : 515,207.70 = 212,179.20 : x
  2. Step 2: Convert to fraction form
    373,361.10/515,207.70 = 212,179.20/x
  3. Step 3: Cross multiply
    373,361.10x = 515,207.70 × 212,179.20
  4. Step 4: Simplify right side
    373,361.10x = 109,316,357,619.84
  5. Step 5: Solve for x
    x = 109,316,357,619.84/373,361.10
  6. Step 6: Final answer
    x = 292,789.90

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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.