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Finding the Fourth Proportional to 331,201.80, 496,802.70 and 316,686.60

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Solution

The fourth proportional to 331,201.80, 496,802.70 and 316,686.60 is: 475,029.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,201.80 : 496,802.70 = 316,686.60 : x
  2. Step 2: Convert to fraction form
    331,201.80/496,802.70 = 316,686.60/x
  3. Step 3: Cross multiply
    331,201.80x = 496,802.70 × 316,686.60
  4. Step 4: Simplify right side
    331,201.80x = 157,330,757,933.82
  5. Step 5: Solve for x
    x = 157,330,757,933.82/331,201.80
  6. Step 6: Final answer
    x = 475,029.90

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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.