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Finding the Fourth Proportional to 499,608.98, 689,418.53 and 281,805.62

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Solution

The fourth proportional to 499,608.98, 689,418.53 and 281,805.62 is: 388,868.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,608.98 : 689,418.53 = 281,805.62 : x
  2. Step 2: Convert to fraction form
    499,608.98/689,418.53 = 281,805.62/x
  3. Step 3: Cross multiply
    499,608.98x = 689,418.53 × 281,805.62
  4. Step 4: Simplify right side
    499,608.98x = 194,282,016,286.14
  5. Step 5: Solve for x
    x = 194,282,016,286.14/499,608.98
  6. Step 6: Final answer
    x = 388,868.14

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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.