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Finding the Fourth Proportional to 331,371.21, 497,019.59 and 91,519.21

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Solution

The fourth proportional to 331,371.21, 497,019.59 and 91,519.21 is: 137,268.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,371.21 : 497,019.59 = 91,519.21 : x
  2. Step 2: Convert to fraction form
    331,371.21/497,019.59 = 91,519.21/x
  3. Step 3: Cross multiply
    331,371.21x = 497,019.59 × 91,519.21
  4. Step 4: Simplify right side
    331,371.21x = 45,486,841,817.07
  5. Step 5: Solve for x
    x = 45,486,841,817.07/331,371.21
  6. Step 6: Final answer
    x = 137,268.54

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1.5x scale

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.