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Finding the Fourth Proportional to 351,624.78, 485,239.59 and 200,721.42

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Solution

The fourth proportional to 351,624.78, 485,239.59 and 200,721.42 is: 276,994.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,624.78 : 485,239.59 = 200,721.42 : x
  2. Step 2: Convert to fraction form
    351,624.78/485,239.59 = 200,721.42/x
  3. Step 3: Cross multiply
    351,624.78x = 485,239.59 × 200,721.42
  4. Step 4: Simplify right side
    351,624.78x = 97,397,979,545.02
  5. Step 5: Solve for x
    x = 97,397,979,545.02/351,624.78
  6. Step 6: Final answer
    x = 276,994.07

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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.