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Finding the Fourth Proportional to 499,990.98, 690,001.32 and 285,166.02

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Solution

The fourth proportional to 499,990.98, 690,001.32 and 285,166.02 is: 393,536.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,990.98 : 690,001.32 = 285,166.02 : x
  2. Step 2: Convert to fraction form
    499,990.98/690,001.32 = 285,166.02/x
  3. Step 3: Cross multiply
    499,990.98x = 690,001.32 × 285,166.02
  4. Step 4: Simplify right side
    499,990.98x = 196,764,930,219.15
  5. Step 5: Solve for x
    x = 196,764,930,219.15/499,990.98
  6. Step 6: Final answer
    x = 393,536.96

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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.