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Finding the Fourth Proportional to 328,202.79, 492,490.91 and 262,063.20

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Solution

The fourth proportional to 328,202.79, 492,490.91 and 262,063.20 is: 393,243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,202.79 : 492,490.91 = 262,063.20 : x
  2. Step 2: Convert to fraction form
    328,202.79/492,490.91 = 262,063.20/x
  3. Step 3: Cross multiply
    328,202.79x = 492,490.91 × 262,063.20
  4. Step 4: Simplify right side
    328,202.79x = 129,063,743,845.51
  5. Step 5: Solve for x
    x = 129,063,743,845.51/328,202.79
  6. Step 6: Final answer
    x = 393,243.90

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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.