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Finding the Fourth Proportional to 328,146.82, 492,247.98 and 91,489.70

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Solution

The fourth proportional to 328,146.82, 492,247.98 and 91,489.70 is: 137,242.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,146.82 : 492,247.98 = 91,489.70 : x
  2. Step 2: Convert to fraction form
    328,146.82/492,247.98 = 91,489.70/x
  3. Step 3: Cross multiply
    328,146.82x = 492,247.98 × 91,489.70
  4. Step 4: Simplify right side
    328,146.82x = 45,035,620,015.81
  5. Step 5: Solve for x
    x = 45,035,620,015.81/328,146.82
  6. Step 6: Final answer
    x = 137,242.29

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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.