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Finding the Fourth Proportional to 328,299.30, 492,084.45 and 128,553.30

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Solution

The fourth proportional to 328,299.30, 492,084.45 and 128,553.30 is: 192,687.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,299.30 : 492,084.45 = 128,553.30 : x
  2. Step 2: Convert to fraction form
    328,299.30/492,084.45 = 128,553.30/x
  3. Step 3: Cross multiply
    328,299.30x = 492,084.45 × 128,553.30
  4. Step 4: Simplify right side
    328,299.30x = 63,259,079,926.19
  5. Step 5: Solve for x
    x = 63,259,079,926.19/328,299.30
  6. Step 6: Final answer
    x = 192,687.22

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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.