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Finding the Fourth Proportional to 328,991.20, 493,717.20 and 210,949.60

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Solution

The fourth proportional to 328,991.20, 493,717.20 and 210,949.60 is: 316,572.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,991.20 : 493,717.20 = 210,949.60 : x
  2. Step 2: Convert to fraction form
    328,991.20/493,717.20 = 210,949.60/x
  3. Step 3: Cross multiply
    328,991.20x = 493,717.20 × 210,949.60
  4. Step 4: Simplify right side
    328,991.20x = 104,149,445,853.12
  5. Step 5: Solve for x
    x = 104,149,445,853.12/328,991.20
  6. Step 6: Final answer
    x = 316,572.13

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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.