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Finding the Fourth Proportional to 331,664.40, 497,399.40 and 154,128.60

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Solution

The fourth proportional to 331,664.40, 497,399.40 and 154,128.60 is: 231,147.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,664.40 : 497,399.40 = 154,128.60 : x
  2. Step 2: Convert to fraction form
    331,664.40/497,399.40 = 154,128.60/x
  3. Step 3: Cross multiply
    331,664.40x = 497,399.40 × 154,128.60
  4. Step 4: Simplify right side
    331,664.40x = 76,663,473,162.84
  5. Step 5: Solve for x
    x = 76,663,473,162.84/331,664.40
  6. Step 6: Final answer
    x = 231,147.73

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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.