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Finding the Fourth Proportional to 393,463.52, 590,021.20 and 112,915.68

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Solution

The fourth proportional to 393,463.52, 590,021.20 and 112,915.68 is: 169,323.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,463.52 : 590,021.20 = 112,915.68 : x
  2. Step 2: Convert to fraction form
    393,463.52/590,021.20 = 112,915.68/x
  3. Step 3: Cross multiply
    393,463.52x = 590,021.20 × 112,915.68
  4. Step 4: Simplify right side
    393,463.52x = 66,622,645,012.42
  5. Step 5: Solve for x
    x = 66,622,645,012.42/393,463.52
  6. Step 6: Final answer
    x = 169,323.56

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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.