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Finding the Fourth Proportional to 499,992.98, 690,004.08 and 285,168.02

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Solution

The fourth proportional to 499,992.98, 690,004.08 and 285,168.02 is: 393,539.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,992.98 : 690,004.08 = 285,168.02 : x
  2. Step 2: Convert to fraction form
    499,992.98/690,004.08 = 285,168.02/x
  3. Step 3: Cross multiply
    499,992.98x = 690,004.08 × 285,168.02
  4. Step 4: Simplify right side
    499,992.98x = 196,767,097,285.52
  5. Step 5: Solve for x
    x = 196,767,097,285.52/499,992.98
  6. Step 6: Final answer
    x = 393,539.72

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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.