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Finding the Fourth Proportional to 499,782.45, 688,982.37 and 356,293.38

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Solution

The fourth proportional to 499,782.45, 688,982.37 and 356,293.38 is: 491,173.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,782.45 : 688,982.37 = 356,293.38 : x
  2. Step 2: Convert to fraction form
    499,782.45/688,982.37 = 356,293.38/x
  3. Step 3: Cross multiply
    499,782.45x = 688,982.37 × 356,293.38
  4. Step 4: Simplify right side
    499,782.45x = 245,479,857,367.71
  5. Step 5: Solve for x
    x = 245,479,857,367.71/499,782.45
  6. Step 6: Final answer
    x = 491,173.42

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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.