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Finding the Fourth Proportional to 393,389.62, 590,172.18 and 112,885

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Solution

The fourth proportional to 393,389.62, 590,172.18 and 112,885 is: 169,352.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,389.62 : 590,172.18 = 112,885 : x
  2. Step 2: Convert to fraction form
    393,389.62/590,172.18 = 112,885/x
  3. Step 3: Cross multiply
    393,389.62x = 590,172.18 × 112,885
  4. Step 4: Simplify right side
    393,389.62x = 66,621,586,539.30
  5. Step 5: Solve for x
    x = 66,621,586,539.30/393,389.62
  6. Step 6: Final answer
    x = 169,352.68

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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.