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Finding the Fourth Proportional to 328,580.17, 492,900.29 and 91,922.15

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Solution

The fourth proportional to 328,580.17, 492,900.29 and 91,922.15 is: 137,891.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,580.17 : 492,900.29 = 91,922.15 : x
  2. Step 2: Convert to fraction form
    328,580.17/492,900.29 = 91,922.15/x
  3. Step 3: Cross multiply
    328,580.17x = 492,900.29 × 91,922.15
  4. Step 4: Simplify right side
    328,580.17x = 45,308,453,932.81
  5. Step 5: Solve for x
    x = 45,308,453,932.81/328,580.17
  6. Step 6: Final answer
    x = 137,891.63

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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.