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Finding the Fourth Proportional to 503,990.50, 755,971.92 and 219,680.87

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Solution

The fourth proportional to 503,990.50, 755,971.92 and 219,680.87 is: 329,515.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    503,990.50 : 755,971.92 = 219,680.87 : x
  2. Step 2: Convert to fraction form
    503,990.50/755,971.92 = 219,680.87/x
  3. Step 3: Cross multiply
    503,990.50x = 755,971.92 × 219,680.87
  4. Step 4: Simplify right side
    503,990.50x = 166,072,569,081.17
  5. Step 5: Solve for x
    x = 166,072,569,081.17/503,990.50
  6. Step 6: Final answer
    x = 329,515.28

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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.