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Finding the Fourth Proportional to 328,496.80, 492,745.20 and 141,872.80

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Solution

The fourth proportional to 328,496.80, 492,745.20 and 141,872.80 is: 212,809.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,496.80 : 492,745.20 = 141,872.80 : x
  2. Step 2: Convert to fraction form
    328,496.80/492,745.20 = 141,872.80/x
  3. Step 3: Cross multiply
    328,496.80x = 492,745.20 × 141,872.80
  4. Step 4: Simplify right side
    328,496.80x = 69,907,141,210.56
  5. Step 5: Solve for x
    x = 69,907,141,210.56/328,496.80
  6. Step 6: Final answer
    x = 212,809.20

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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.