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Finding the Fourth Proportional to 328,268.30, 492,358.64 and 91,634.90

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Solution

The fourth proportional to 328,268.30, 492,358.64 and 91,634.90 is: 137,440.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,268.30 : 492,358.64 = 91,634.90 : x
  2. Step 2: Convert to fraction form
    328,268.30/492,358.64 = 91,634.90/x
  3. Step 3: Cross multiply
    328,268.30x = 492,358.64 × 91,634.90
  4. Step 4: Simplify right side
    328,268.30x = 45,117,231,820.57
  5. Step 5: Solve for x
    x = 45,117,231,820.57/328,268.30
  6. Step 6: Final answer
    x = 137,440.11

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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.