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Finding the Fourth Proportional to 357,939.72, 536,192.82 and 215,705.88

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Solution

The fourth proportional to 357,939.72, 536,192.82 and 215,705.88 is: 323,126.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,939.72 : 536,192.82 = 215,705.88 : x
  2. Step 2: Convert to fraction form
    357,939.72/536,192.82 = 215,705.88/x
  3. Step 3: Cross multiply
    357,939.72x = 536,192.82 × 215,705.88
  4. Step 4: Simplify right side
    357,939.72x = 115,659,944,087.78
  5. Step 5: Solve for x
    x = 115,659,944,087.78/357,939.72
  6. Step 6: Final answer
    x = 323,126.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.