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Finding the Fourth Proportional to 328,147.82, 492,249.48 and 91,490.70

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Solution

The fourth proportional to 328,147.82, 492,249.48 and 91,490.70 is: 137,243.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,147.82 : 492,249.48 = 91,490.70 : x
  2. Step 2: Convert to fraction form
    328,147.82/492,249.48 = 91,490.70/x
  3. Step 3: Cross multiply
    328,147.82x = 492,249.48 × 91,490.70
  4. Step 4: Simplify right side
    328,147.82x = 45,036,249,499.84
  5. Step 5: Solve for x
    x = 45,036,249,499.84/328,147.82
  6. Step 6: Final answer
    x = 137,243.79

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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.